Sorry if this is long! but thanks for anyone who is willing to read this and give me some insight. I really appreciate it. 

I am so frustrated. I don't know what to do... On one hand I really need to get this off my chest, on another hand I really can't believe that I am saying this about my own father.
My dad, growing up was pretty good... he was always there for us and he made sure we always got taken to school and picked up from school. My dad grew up very well off... and he's always been in a situation where he was able to do anything he wanted but he has definitely shown our family a sense of LAZINESS in the last couple of years. He is not driven to do anything because he's always had it handed to him. I don't know what happened but he just changed. He almost became depressed and it's like he resents everyone around him. He has always been well off so when he started his own business he started off successful. Along the way there were some troubles with the extended family and he ended up traveling and doing his thing for a couple of years. Leaving my mom to work full time and care for us. My mom has ALWAYS worked. She never took time off even when we were growing up. But with the lifestyle that my father had made for us, it was difficult for my mom to uphold it on her own. They never separated or anything but all the weight was on her.
when I was in grade 6 they decided to sell our old house and move in with my grandma and grandpa because they weren't doing well on their own. This is my dad's mom. Her and I don't see eye to eye but I do my best to be as nice of a granddaughter as I can be. She is very cynical and rude and it is really difficult for me to force a smile on my face 24/7. When we moved in with my grandma my dad had taken on the responsibility to take care of her because she was unable to care for herself. We were also living with my grandfather at the time. In the last number of years my grandfather had passed away and my grandmother started to get worse.
I know a lot of the tension between my father and I was that when my other grandpa (the one from my mom's side) had passed away, I was noticeably upset. He was like another father to me... I think I probably loved him MORE than my own. He passed away in Feb of 05. My dad's father, my grandfather, that I was living with at the time passed away in Dec. 05 and for some reason, although there were times that I felt upset, most of the time I felt nothing. I didn't go out of my way to make it look like I wasn't upset. I was quiet and I tried to be as comforting to my dad as possible but I just didn't have that uncontrollable crying that I had with my other grandfather.
Well, back to the story with my dad... he gets upset pretty quickly. I've learned to shut my mouth when he is being unreasonable and just step aside. But it's to the point now where it's almost unbearable. He is hardly working anymore... and living off what his "success use to be" and basically leaving all the rest of the responsibility to my mom. She does EVERYTHING for my brother and I as my dad just sits around and watches. I understand that he spent the good chunk of his life working non-stop but it's been 10 years now since he's really picked it up and I can see the strain on my mom. It's not that they are in a bad place financially, it just feels like my mom doesn't have any help at all.
I recently started my new career and I know for my age and what I have achieved academically and career wise is light years beyond what others have done. My mom was so happy for me, but my dad... nothing. It was like HE CAN'T be happy for me because he's not happy himself.
When I tell him about stories of work or things that I have achieved or overcame, he brushes it off like it's no big deal. If I give him an idea, he puts his "insight" (and 9/10 times it's negative and putting me down) where he preaches and talks but he doesn't walk the walk.
He has so much bad energy around him. I am very close with one of my cousins and we decided that we are going to start a company together in 09. We want to build enough capital first... and when I brought it up to my mom her reaction was "I always knew you two were the most business savvy in our family. This will be exciting to watch... just know what you get into". My dad on the other hand had nothing but bad things to say about my cousin and how he "grew up". And I don't even know what his problem is. It's like, you cannot see others be more successful than you but YOU won't get off your ass and actually do something about it. I feel like I've lived a lie for the longest time about my father. It's like I am ashamed to say that although my dad has been successful before, that I feel and view him as a failure. I feel like when someone asks about my relationship with my father I have to say that it's great, knowing damn well that I ca hardly stand the man. I am not trying to sound conceded but I am 20, I started university right out of high school. I did it correspondence and started my career in marketing and sales. I am now 20 and is a senior account executive for a very well known broadcast group in Canada. I know that many people that I meet are shocked as to why I want to work so early or is working so hard to be something so young. Many people react to "wouldn't you just want to go party with your university friends". and honestly, I don't. A lot of people praise my parents for the way I have been brought up, but really I feel all the credit should go to my mom. I have told my dad that when someone asks how the heck that someone like me end up where I am, I always say that it's because my parents. And he just shrugs it off like it's no big deal. I feel like a LIE to say I look up to my dad.
The thing is, I want to bring this up to him. I want to lay it all on the line before it is too late and I resent him for the rest of my life. But I KNOW he is someone who cannot take this sort of criticism. Especially from his kid. He will get noticeably upset about it within the first minute and start interrupting me and turning it around so I feel the guilt. He's done it many times when he has overreacted and I tried to rationalize with him to make him see that I wasn't getting upset or anything so why is he upset? and he just turns the situation on me.
I'm done with telling my mom because I know it only makes her sad that my dad and I had such a bad relationship. We use to be so close and I use to the "daddy's girl" and now I can hardly stand to be around him.
I just don't know what to do...