A few years ago me and a guy used to like each other a lot & we were so close but we never became boyfriend and girlfriend...
We grew apart, he got a girlfriend(they split up now) and we haven't spoken since then,.
I've tried to spark up conversation like I gave him a picture comment on myspace but he didn't even say thank you although he said it to other people, its like I don't exist to him.

Its not like he avoids me but we'd walk right next to each other in the hallway and not say a word and when we look at each other he just stares right at me and I'm always the first to look away... its almost as if we never knew each other. I just don't understand how we were so close and now its we don't know each other.
I don't know if he knows that I still like him.

I want to speak to him but I'm to worried that I'll make a fool out of myself or he won't want to talk. I just want to be friends with him again.
Why do you think he won't speak to me? Is he embarrassed that I like him? Do you think he still likes me?

I have no idea, maybe he is asking the same thing you are and has the same fears. Why don't you send him a PM on his myspace and ask him, tell him how you feel.

He's spending no time at all pondering the questions that you are. You need to realize that. You can trust his actions. He's ignoring you because he has no desire to revisit your old relationship. None.

You don't need to interpret good or bad from this fact. You don't need to think ill of him for it, he's being honest. You can be thankful he doesn't lead you on. You clearly like him more than he liked you. That's it. That's reality.

This is already over and for whatever reason, you are maintaining this in your head/heart. It will get better when you stop doing that and move on to your next real thing. This one is just a memory.

You don't know if he is thinking of you or not, he might be. I'm assuming you guys are teenagers and teenage boys don't always say what they mean. If it means that much to you, it will not hurt to just ask him, then you will know for sure. If he tells you he does ot want to be friends, you may be hurt for a while, but at least you'll know.
Good luck