Ex boyfriend situation???

Auburn • 🗡 17 y/o shark of a lady 🗡
So  I was dating this guy for a year and a half and it was extremely serious he's my first love and what not and I'm now 16 and he's 19. I had rebound sex with someone after we broke up and at first I didn't tell him. We recently started talking again nonromantically and then it ended up coming out that I had had sex with someone else and he's really upset about it. I really loved talking to him again and it's still so comfortable I just wanna talk to him again. I just wanna hear some opinions on if I'm in the wrong or if he's being dramatic or when I can talk to him again lol