Struggling with my Sons' Behavior

I have been feeling severely depressed lately. I have two sons . I have been there mom and dad. I have been in domestic violence with there dad for twenty years. I did the best in my seasons. my oldest is 26. I was not feeling his girlfriend, manipulation, chaos in here home, separate us, telling things about me to him. because she went to college to be a psychologist. lol. she seen I had my son's back. his spirit changed and he brought the energy in my home. I felt off with him. last straw, he never disrespect growing up, but curses me out because he thought I or his brother scratch his brand new car. which didn't . so I put him out. A year ago. now my 20 year we were in a ok place. He got mad because he called me , a cop lied on him pulled him over and I said something he didn't like. but I have always be the STRONGEST BIGGEST ADVOCATE FOR MY SONS. GE WENT OFF ON ME . AND WENT BACK. BECAUSE HE THOUGHT I SAID SOMETHING. I TOLD HIM LEAVE. He came home mad, putting me down, saying nasty things . A side that wasn't there. So I like wow. I said I apologize calm down. he said get off of me. I am leaving. I have MS, I have no one I have been fighting battles by myself. I have been crying tears no one seen. They ask , I give if I can if they need me I drop in pain, to assist them. Now they don't want to talk to me. but They have been taking advantage. yes granted in teenage years, they give me mother day cards, Christmas gifts. but they started to change. I ask the oldest to help me it's always no. no. I guess I got fed up. Because as a mom disabled my oldest says your always home. Like a attitude. I feel like crap. I cry everyday to see this happening. Because they don't see there wrong. I apologize because yeah I am not perfect. I was in survival mode all my life from there dad, my child hood, making sure there good. I put them first. So they say they don't want to talk to me. one counselor said they are selfish and manipulative towards you at times. I just can't believe my flesh did me this way. times I thought about leaving.