My first hookup with a guy. Need advice

So I’ve dated girls my whole life and had never really thought about hooking up with guys. Anyways I dated a girl for a year, and we broke up. After we broke up, her best friend who is gay, added me on all my social media’s. He started messaging me and we talked.I got drunk last week and ended up over his house. We made out a lot, and I sucked his dick even more. It was really hot and I enjoyed it a lot. He promised he wouldn’t tell my exNow he’s hanging out with my ex gf all the time and I’m wondering do you think he told her about us? And secondly do you think if we started dating my ex would be mad at both of us?