Advice don’t be rude kind of needed to vent

I had a high school sweetheart we were together for three years we got pregnant at 18 that ended in an abortion. He left for the boot camp and I found out he was cheating with another girl right before he left. We cut off communication the 8 months he was gone. He would try to reach out during that time but I kept ignoring him. When he came back home he was only home for a month then got deployed for 3 months during the 3 months he was deployed he kept trying to reach out. Finally one day it was with a really long apology. He said he wanted to get back together. I told him I wasn’t going to be involved if he was still with that other girl. He said he broke up with her. We started seeing each other again. But she would constantly bother him calling him through no caller ID balling her eyes out threatening to hurt herself if he didn’t contact her or be with her. Then her mother got involved and asked him to stay in contact with her for now because the daughter was struggling. I told him I didn’t want him to do it and that she wasn’t his responsibility. But he let her back in and I stopped talking to him again.

We’ve been in this cycle for 2 years now. Talking then not talking. He doesn’t want to be with her he has told her this multiple times. Her answer is always he doesn’t have a choice and she doesn’t care that he’s the one she wants to be with. He has had to call the cops on her multiple times because she shows up at his house unannounced and won’t leave. Shell walk in the house when he is sleeping and everything.

A week ago she contacted me that she had been spending the night at his house still. We all met up at his house had confrontation. He told her that he has been honest with her in wanting to be with me and that she knows that he is talking to me and wants to be with me. He told her that they’ve had multiple conversations that he doesn’t want her.

I told him to get a restraining order he said it takes a while and a hearing and he doesn’t want to go through all that. I told him I’m not doing this I’m not sharing him. He said I’m not but I am and he is upset that I won’t see him or be with him. She has made it clear she’s not going to let him go. Even though he doesn’t want to be with her?

Am I wrong for not sticking around for this? He keeps telling me I don’t understand and that if I did I wouldn’t be acting like this?