What's wrong with me?

I got out of a long painful relationship and only recently started talking to other people again. I recently started talking to this guy and I was very sexually forward and flirty with him, which he took well and went along with but he also likes to just talk and get to know each other and he genuinely wants to know more about me and I think I'm beginning to really like him and he told me he really likes me. These emotions are scaring me and I feel like running away for some reason.🙈 I don't know what's wrong with me. (Please don't be mean)