My suggestion would be to try to dial back your feelings (I know, easier said than done) Pick a day and when you see him in his office ask if he would like to get some coffee. If he says yes, you don't want to scare him off, keep the conversation light. You can learn a lot about him during this conversation. If it goes well, wait a few days and ask him again, maybe telling him how much you enjoyed the last time.
I have found that when relationships start out as friendships they are more successful. You have a better idea of what you're getting into.
I hope this helps.