Sorry I just need to get this off my chest.
So after graduating college, my boyfriend and I moved back to my hometown because he got a great job here and I wanted to move back in with the parents and save $ on rent. I was so happy he was here and we weren't ready to move in together so I suggested that him and my friend move in together because they were both looking. She was a great friend and always there for the people around her and I didn't think anything negative would come out of it. I trusted both of them and I only lived a couple blocks away. Well fast forward to a couple years later. I found a great job in LA which is about 7 hours away from home and he found a job down there too. We still don't live together but see each other all the time. We moved down a month apart. Well he moved down after me and the things that have happened since have really upset me. She helped him move and stayed at his place and stayed with him for about a week. I only found out because he told me. Then a few months later, she was going to disneyland and stayed at his place, and again I had to find out from him that she was visiting. During this time his and my relationship got a little strained because we were fighting about other things and I would always bring this up. I know that he did not cheat on me though with her because whenver she was there, our other friend was also there and he lives with our bf. But I know that my bf only sees her as a friend and doesn't go out of his way to call her or text her. I am home at the moment for holidays and hung out with her and some other people. I told them that I thought she was in love with him and they were like um yea how do you not notice. They said that if she called their bf as much as she calls mine they would be really upset. She has even told her new roommate (while drunk) that she is in love with him and wishes he was single. Also I found out that she thought I was over there too much when they lived together and she didn't like it (which is stupid because most of the time when I was there she was at work or we were in his room). I have told my bf that shes in love with him for months but he just brushed it off. I was like whatever, they dont live in teh same town and don't see each other. Now that I know I'm 100% right and its been confirmed by other friends I am

. I called him last night and he was genuinely surprised. It is unrequited love for sure from her end. He says he has no feelings for her and he has never treated her in a way different from his other guy or gal friends.
I don't know what to do, whether I should say something to her or just let it go since we don't live here anymore and I KNOW that my bf has not done anything with her. Should I be upset with him as well?
Has anyone here been in that situation?