Am I Totally Incompetent? - Does he like me or not? - I feel so lame asking this to random Mibba strangers...

I'd like a little help.
I like my ex boyfriend [lets call him Earl] and I want to know If he still likes me.
(If you want the whole story,why I broke up with him, PM me.)

I've only seen him once in the past year (twice if you count the five minutes at wal-mart) when I saw him, half the time he avoided me and the other half he acted all friendly.
My friend that was with me kept telling me he was staring.
His sister told me that she knew I liked Earl. I denied it.
He acted like an idiot around his friends and one of his friends mentioned Earl and my relationship. Then Earl shook my hand before I left. (Weird much? I thought so...)
(note: a few weeks before, I confessed to Earl that I like him again but told him to forget about it if he didn't feel the same way)
Is there any indication that he may like me? If so should I proceed to re-ask him out this summer at camp?
I really like this guy and I want a second chance with him.
I need your help to know if he likes me or not.
Am I blind?