How do you rebuild a 8 year friendship thats been neglected for the last 2 years?

I met my best friend when I was 16 and she was 15. We didn't become friends for 2 yrs because he mother thought she should be my friend andthat made her not want to be friends. We knew a lot of the same people and one day we all got together. We realized we have a lot of fun together and she was my best friend from the point forward. We didn't have to spend a lot of money to have fun and it didn't matter where we were. I thought, ur friendship was built on communication because we were just as good of friends when she went away for college for 2 yr as before college. We could talk about anything. But something has happened in the last couple years, We seem to get upset with one another a lot, I don't feel she gets me, and we dont have as much fun. I never feel like she listens to me and I feel like she judges me. She says stuff that makes me feel bad and the way Im trying to tell her isnt working. She gets upset with me because im upset. I miss her friendship.. our old friendship. I miss talking to her. I miss hanging out with her. She has a son (who i adore and she says he likes when i visit) and she has a boyfriend (who i cant stand because hes rude and mean and she picks his side no matter what i feel). I need a way to talk to her and tell her that it hurts my feeling when she says stuff like he's my boyfriend not yours so if i want to say its your fault than i can (when they first met) or when i try to tell her that im upset because she said something to me she gets upset so i stop telling her stuff and she feels replaced. It makes me want to cry because sometimes she says stuff that makes me feel like she is judging me or thinks poorly of me or wants herself to look better at the cost of me. We use to have so much fun together. We use to be able to talk about everything and have fun doing anything. I think, if I rebuild the friendship it will be stronger. I want to and in the past she has said she wanted to. I dont think we have either done anything worthy of throwing the friendship away.. to me it feels like we grew apart because she cant talk to me around her boyfriend because he listens and gets upset. She can oly talk between 4 and 5 on Friday. And she does all the talking and i listen and say a few things. I miss the old friendship we had and hopeto build a stronger friendship. But i dunno how to rebuild our friendship. Can anyone help me or give me suggestions. Is it worth it.