He likes you, and you feeling all weird means you like him.
He bumps into stuff around you and seems more forgetful.
This may take awhile.
He may always gives you a hug when he sees you.
You always seem to catch him staring at you.
He ask about you.
Tries to impress you.
Tries to make you laugh.
May try to ask questions to get to know you.
Smiles at you.
Finds a way to touch you (This may also he wants you sexually)
Oh yeah, he likes you. But be careful these guys are getting smarter and smoother:)
He gives you that look.
If he's jumping up and down naked by your bed
He shows you and he tells you.