Is it normal to have a huge crush but not wanna do anything about it?

I haven't had sucha huge crush on someone in a long time. Probably because Ive had a boyfriend and honestly there hasn't been anybody that has caught my eye. Yeah there are attractive guys but there's a difference between someone attractive and some who screams your type! I've recently met this guy in my building and wow, not only is he cute but it just seems like we can hit it off so good. We've already "hooked up" as in made out and he fingered me. I hesitated to do more though because I don't just let lose that fast. I already felt like it was too soon for him to finger me but we were in the moment, literally blasting music in the background, hooking up to the songs...cheesy? yeah but it was all in the moment. We haven't done anything since then which has been like two weeks, not even kiss. We usually see each other at parties and lately its been different. Not sure if the spark is over already cause it comes and goes. He still texts me and approaches me the same way. We might be sending each other mixed signals and don't even know it when the both of us want each other, who knows. Regardless, once the spark flows again, I literally am just gonna go with the flow because I am scared of taking it seriously with him. I believe its cause I'm shy which is because I feel like I might not be good enough for him :/ As much as I see us together, in reality I feel like I would just kill the whole thing. Its a confidence thing I guess so maybe things seem different cause I am over thinking it? I wish I can just be confident and do what I wanna do which is see where it goes with him. But for right now, I am just keeping him as major crush. I can't stop thinking about him, talking about him, not even when he bums me out. I tell myself don't respond to his texts or talk to him in person but I can't help it. When you have a crush this bad, you'll just do anything to be around him.