I'm an 18 year old guy and I'm in a very weird place right now

[dotcomdotuk]

I had this huge crush on a girl for four years and when I finally spent time with her and I believe I actually fell for her, she turned out to be with someone. Since, I really haven't felt anything, but a big void. I'm somewhat of a reserved person, so even though I have great friends, I don't seem to connect in the way that I'd like to connect with any of them. I've been looking everywhere for that friend, you know just someone who I can really share with; meanwhile my romantic feelings seem to be completely dead. And so, recently I noticed this guy, who I really admire, because he's good at sports, social and good looking; normally, I didn't care much for him, but somehow it just appeared to me as if he could be that one friend. Ever since, he's been around a lot trying to make conversation (he called me by my nickname, even thought we haven't oficially met), I believe that he feels the same, 'cause the other day he sat by me and started playing his guitar and it seemed like he was trying to impress me. I got really confused, 'cause now, when he's not around I miss him and feel lonely as hell, and when he is I get nervous and shy. But I don't think it's a gay thing, I don't think of kissing him for instance or I don't have the overwhelming sensation I had with this girl I mentioned (or girls I've liked, period), but I'd be happy to have him as a friend, somehow I think he could be a great friend and my insticts are usually right.
-What does it all mean?
-What should I do?
-Am I just imagining things?

Thanks for your help!

[CheekyChops]

Ok, I will take your questions one at a time...

- it means he wants to be mates
- you should be mates with him
- only if you are imagining something other than mates.