He's blowing hot & cold. Should I move on?

I’ve been seeing this guy for a little while. We have so much in common. We get along brilliantly & I really enjoy his company. He’s witty, friendly, we share a lot of the same interests, etc. All was going well, until recently I felt his attitude changed a bit. I suppose he just became slightly more distant, there was less contact from his side, etc. We’ve had dates and he came across as being a little nervous. His last relationship was quite a while ago as far as I’m aware. The killer is that he’s not a big communicator about the significant stuff. I’ve put myself out there with him a couple of times & I feel I’ve been left hurt. He seems to ‘redeem’ himself in my eyes every time. He does something that upsets me & then does something that makes me fall for him again. Basically, I can’t seem to walk away because I’ve strong feelings towards him. Am I making a mockery of myself or is there a possibility that he’s nervous about the threat of a commitment? I’m terribly confused.