I still have these feelings for a man that i haven't seen for ages

It all started when I was about 15 I am now 19.

I used to hang around with a guy and his girlfriend who was just a friend and he has had a girlfriend way before I began hanging around with them both. We used to do alot of things together all 3 of us and I used to look up to them because they are both a bit older than me.

I did have a crush on this guy when I was younger and his girl got all uptight and hated me seeing him and got real jealous because I liked him. And one time when we had a sleepover at his (his gf wasn't there I shared a bed with him BUT THERE WAS NO SEX NOT EVEN TOUCHING!) But I felt special that night because he never offered any other girl there to share his bed. Sounds a little stupid I know!

Well he went away for a while and I wrote to him and I gave her the letter to give him but she didn't give it him. When he came back early in 2009, he sent me alot of nasty text messages saying "I'm the reason their relationship is messed up" (I was young and had a crush)
So I thought fine don't need this and left it at that.

Early this year he added me on Facebook, we got talking again and he apologized and said him and his girlfriend are having a bad time and it wasn't my fault in his eyes. I was also going through a bad relationship at the time (an abusive one) we was just talking about how crappy our relationships were and kind of found sanctuary in each other.

He told me that he used to really like me and that's why he had to send them texts so his gf would get off his case.
Then he says he "still does like me" and asked how I felt, I said I felt the same after all that time. I told him about when he went away I cried for nights, seems silly now but I used to really like the guy lol.

Anyway we met up and we kind of had a thing we almost kissed but we didn't, we got close, but never did anything. Because of our relationships at the time, as much as we liked eachother we never would of cheated.

What's bugging me is why am I just sat there some nights thinking about this? I mean nothing happened we had no connection on an intimate level, so why all the thoughts? I don't think I love him, so I don't know what it is!

That was like almost a year ago, sometimes I still find myself thinking about it and getting butterflies over it!