from my life experiences thusfar I'd say
- living together
- how they are at their lowest point/broke/struggling/poor health
- how they are their highest point/excelling/on top of the world
- how they are towards YOU/OTHERS when you or others are at your highest point/excelling/on top of the world
- how they are towards YOU/OTHERS when you or others are at your lowest point/broke/struggling/poor health
- when you get into an argument/how they handle conflict
- how they are when you or others need them
- you hear how others who have known them for along time think of them- friends, family, colleagues
- what people do when they think no one is looking, when they can't get caught and when no one they know is around to hold them accoutantable
some 'friends' just will not and cannot be happy for you if excelling in life, love and/or money
I've never liked friends who seem to talk negatively about others for sport or to make themselves feel better about who they are
living with a SO or friend can be a very revealing experience about them and also about yourself
I have a friend that has been laid off twice who is an educated professional and has not had a steady job in the last 3 years and was on the brink of foreclosure recently and was often barely getting by day to day. How should handled the whole thing was amazing to me. She used the down time to help others and volunteer when not job hunting. She remained so positive and upbeat. She never asked anyone for help though all us friends pitched in to provide it anyway. I know others who would never have handled being on the brink of bankruptcy the way that she did and with major health issues on top of it! A strong woman. She found work with a stable quasi-govt job this year and is on the road to recovering financially now and still has her home and avoided bankruptcy.
I learned a lot about my DH (wow I can say that now!) the past year from people who knew him in younger years until today and hold him in such high regard regarding where he came from to the man he is today and about what a good person he is. When you hear it over and over consistently it says a lot.
A lot of things come out when there is conflict...how one handles it is a great testament to their character and if a relationship with them with stand the tests of time