Dilemma

Hello, so I'm kind of new to the dating scene. I'm 20, and a virgin. I'm just now starting to explore, and trying to meet guys. So I have this dating app, POF, that my friends told me to try out. I went onto the app telling myself that I would not just hook up with guys. I wanted to build friendships first and maybe a relationship would form after that. So I started talking to this guy, and he seemed really cool, we clicked and everything. So after a week or so, I decided to go to his house to hang out with him. (Dumb mistake) and we were hanging out and out of nowhere we started making out, things got heated and I gave him a blowjob. I feel so stupid for letting my guard down, and doing exactly what I told myself I wouldn't. I ended things with him after that. But he keeps saying he didn't want it to be just a hook up and he genuinely liked me, and maybe we could have became a real relationship. My friend told me he's just saying anything to hope we'll hook up again. I don't know if I should just move on and leave the situation alone, or if I should give him a chance and actually try to build a relationship. Any advice would help ladies, thank you in advance.

(Hope this wasn't too long to read)