Will he try again or just let it go?

Hello, I dated my ex boyfriend for about 6 months. Everything went really well.. he was attentive and considerate. One day I lashed out at him and wanted to break up for no reason like always. Usually he’ll always plead to do better and stuff but this time he just asked if that’s what I really wanted. I said yes. One week went by I texted him first and apologized and ask to try again. He said he had doubts and didn’t really text as much as before. I said if he had doubts then there’s no point in trying again. I said that out of anger. Then he suggested to be friends and at first I declined then I gave in. That month just staying as friends we didn’t hang out that much, maybe twice but it was me who initiated. But we do talk every day on the phone and text all day(even more than when we dated). He would also get really jealous if I talked about other guys. Like if I said I was going to hang out with a guy he would call me right away. His behavior lead me to think that he still liked me and made me realize that I can’t be friends. I tried to break up the friendship bc I know i’ll End up hurting later but he went crazy and begged me to stay friends and do whatever it takes to stay friends. So I gave in once again and a week later, I found out he went on dates with a girl and told her she liked her but not sure if he liked him. He was the one who told me bc I asked him. Then I got hurt and ended the friendship 2 days ago. Told him it is selfish of him to want to stay friends when he knows I’ll be hurt. Just felt used. During those 2 days he called me and texted me nonstop so I had to tell him to stop. I gave him another chance Either try again or let everything go. He chose to let everything go... he said we get Along really well and that he loves talking to me but he don’t think it’ll work out. He just has certain preferences and he’s wanting to get married within 2-3 years so he doesn’t want to waste his time.

Now I’m wondering would I get a chance by doing the no contact or should I just move on. I’m disappointed bc I know he’s a really good guy. I know he will try to contact me again by next week bc he’s really persistent, so how long should I do the nc rule?

Thanks!