Advice Needed!!!

I was just completely heart broken by my ex boyfriend when he cheated on me while we were in a serious, long term relationship. I just recently met this guy, I’m not really looking for a boyfriend rn, but he definitely caught my eye. He’s different, and I like it a lot. We go to the same college together and we’re in a club together. We flirt every time we’re in there together and we have this big lame group chat with the whole club and he always singles me out and texts me in the group chat. He begged me to play FortNite with him and I absolutely hated it but he’s hilarious and the only reason why I want to play is because of him. I thought it was weird that he doesn’t text me individually, but i didn’t think anything of it bc he’s usually busy with school or work. The next meeting someone asked about his girlfriend and he said “yeah I can’t stand her though”. This caught my attention bc I had no clue that he had a girlfriend. I asked his friend about them and he said that they’ve been dating for awhile but he’s starting to lose interest. I’m confused on what I should do, because he keeps flirting with me and I don’t think its right if he has a girlfriend, unless he plans to break up with her.