Okay.how do you know if your ex wants your attention?

He annoy the crap out of you lol he might try to do foolish things also, such as trying to make you jealous or angry, etc.

But it really depends on the type of person he is on how he'll do it.

Mostly,they don't.

But there's not a lot of information here so come back and add some more details please.

They will tell you.

Well ,he stopped talking to me after he got a girlfriend. But when I got on to Facebook he started to comment on others pic,(wich he never really did when he was with me) and when he got online he got off right when I did. But I don't know .

Sounds like he's trying to avoid you,

I wouldn't dwell on what he is doing now, he does have a new girlfriend after all.

Did you break up with him? How soon did he move onto this new girlfriend?

He the one who broke up with me, and after the one week he got a girlfriend

In my opinion he doesn't want your attention. I would just move on and ignore him.