intuition vs conscience

Okay so I have a problem. I really really like this guy, but I have my guard up because my intuition is telling me something's off. But now that I think about it what if that's just my conscience reasoning from overthinking and really my intuition is telling me to go for it. Because I really do see something between us, he even says it. He has a past and I do believe him that he only wants me. We talk everyday, FaceTime for hours every night (long distance, but I'm moving to his state in a few months) but I'm just so insecure when it comes to guys because there's always a girl who prettier smarter funnier etc. so I just don't know, advice?