Its been only a few weeks when he asked me out.
And nothing much has happened yet. Nothing to to tell about the relationship.
But when I compare the days when we were friends or of those days piror of asking me out... now it kind of feels dead... when I asked him if have pissted him or or anything.. he asked me not to worry about anthing and he wasn't mad at me.

And one strange thing is that he would ask me to join him or a workout usually. Now he goes by himself and I find out after he's been there. And he usually convinces me to come with to parties but this time he said he is going with the boys.. ( we have common frnds).. and he didn't convince me to come when I was still in 2 minds.

And recently he mentioned that there's a lot going on with him.. but won't tell me what excaltly it is about.

Don't know what to do.? Should I give him space.. and wiat until he contacts me? Or what?

It sounds like once he moved from being your friend to a possible romantic relationship, it changed things. It is possible that he now feels uncomfortable, because of that change, and has decided that, because he is not interested in a romantic relationship with you, he can not just remain friends. Things won't be the way they were before. This is very normal. Sometimes people think they might want to go out with someone and it takes a few dates to realize that is not what they want.

It would be best not to be down about it and just try to continue your life without analyzing the situation. You don't need to contact him. He has made it clear enough that he is not going to pursue you. Try not to take it personally (even though it really feels that way). It happens. If you bug him, he will run even faster.

Most likely, he wants to get a teeny bit closer. Maybe if you go see a movie with his friends or your friends (or a mix) get a seat next to him. About 1/3 of a way through the movie lean your head onto his shoulder. But if you don't feel the same way, just have a gentle talk with him about it! :)