I need some advice, just a little scared...

So I met a boy, and he had a girlfriend. He was on the verge doing something he’d

Regret and said, none cares for me, and I said Why don’t you see it?! He was like what do you mean. And I was stuck in a position and told him I liked him. He stopped and was like I like you to. I was very upset, and said but you have a gf, he automatically started flirting with me, and I got upset.. I told him not to flirt with me cause he has a gf. Well both of their parents didn’t agree with the relationship and said for them to break up, they broke up and he flirted with me. I felt bad for her. But he got back with her and let her read everything and I was like.. I trusted you with a lot. She friended me and I haven’t yet to accept but I’m scared that, rumors could happen? Saying I was cheating. When neither of us were. I don’t have feelings for him anymore, in fact I’m livid. But I’m still terrified any advice?