I hang out with his guy friends a lot and theirs one guy I've been growing a little closer to. Were just friends but we've hooked up a few times. My ex found out and told me he was very upset. That I hurt him because he was his friend and he was saying I was acting like a groupie. I don't regret hooking up with his friend but I feel bad I hurt him. I don't sleep around whatsoever and this guy is the only person I'm sleeping with. We made up and our friendship was back. It was as if nothing happened.
Just this week though I spent the night at my guy friends house and we hooked up again. When it was morning, my ex walked into his room (they all share the same apartment complex) because he wanted to ask him something. My back was turned on the bed but I knew he noticed me. A couple hours later I crossed paths with him when he and all the guys were going to get something to eat. He didn't say hi or even acknowledge me. When I went home I went on Facebook and saw he blocked me. I texted him and he never responded.
I don't know what to do. Its not fair because he put almost nothing into our relationship when we were together. So why care now? I feel like I am my own person.
what should I do?