he most likely loves you but is scared
He's eaither feeling you up or he just wants a hug.
When a guy hugs you tight, it often indicates a strong emotional connection or affection towards you. It can also signify a desire to protect and comfort you. The tightness of the hug may convey a sense of intimacy and closeness.
EITHER THEY LIKE YOU AS A REALLY CLOSE FRIEND OR MAYBE AS A GIRLFRIEND.
He either really REALLY likes you or he's playing around.
A tight hug goodbye from a guy can indicate that he appreciates your company and might feel a strong emotional connection towards you. It could also suggest that he values you and doesn't want to let go.
It Means he wants it. :)
SHE LOVES HIM!
It means he likes you ;-)
It means he wants to have sex with you.
He miss the girl
He either likes you, is just a really friendly guy, or he wants to strangle you