Relationship Advice... Was he Nervous or What?

I have this guy I was talking to for like 3 months. I ended things with him because we had diffrent view of things...and diffrent lives and things just werent going to work out, although we had a good connection. Well about 3 days ago we started talking again and we told each other that we really miss each other and that we arent over each other yet. After work we met and sat outside and talked. He was acting really funny. he would get close to me but yet he would get up again and stand in front of me... than he's sit back down again and when I would stare at him he would look away. He would put his arms around me but would pat my shoulders like a friendly type of pat... (it was weird) I felt like what we had before isnt the same. It kinda felt weird for me... and although i tried getting comfy with him he was just acting like a big mess. I wonder maybe he doesnt feel connection any more or maybe I was being tooo clingy?? although I didnt just automatically threw myself at him or anything... i just put my head on his shoulder.. which isnt a crime but when I asked him this morning why he was acting weird yesterday his escuse was he hasnt been with a girl in a long time so he felt nervous than he changed the subject automatically.... I cant seem to help but think we lost chemistry and he feels it he just doesnt want be up front about it... not to hurt me... or something... What should i do??