EX texting me to piss off when he left me

Okay ladies! I need to rant and I need the hype!

So my ex and I ended on good terms. I was upset that he didn’t want a serious relationship rn but he’s 21 so I understand. He took my virginity and now I feel like a horn dog because I just wanna have sex. Well I got a lil tipsy. I’ve been thinking about this for a while and I’m ok with just being friends with benefits and not getting serious. Well I told him what I thought and it was ok. He asked who I was with tonight hanging out and told me to be careful. He then tells me he doesn’t like the guy I’m hanging out with and to be careful. I said ok. Blah blah and he then told me some other shit, so i told him “I’ll be okay, I’ve been by myself. I was just feeling alone since we stopped talking and needed someone to talk to (since he said we could still be friends). Eventually I posted on snap a video of me and a friend drinking beer. He’s never liked this guy and I stopped hanging out with him whenever me and my ex were dating. After we broke up I decided to hangout with this guy and we had a few drinks, resulting in the video. Then my ex decides to slide up and tell me to “piss off”. I told him “your the one who decided just to be friends with me. You have no right to be jealous over who I hang out with because you left me. I was all yours and I gave you everything but that was your decision”. He goes “talk to me when your sober”. I know I was tipsy but I knew what I was talking about. I’ve been wanting to tell him for a while but I just never had the nerve since I’m such a relaxed and not feisty person to their face . He really hurt me. But he doesn’t have the right to tell me to piss off when he decided to leave me. Am I right?