They love you, date them as much as possible
They want the sex! give it to em or else.
They love him
He's either the utimate hunk, or they know something "special" about him that's embarassing to them.
they matbe blush up with one guy because he is the finest in the college or he got somthin they like,.... of course
they are just impressed by his age. they can't date younger or older he must be really really really cute
They are crushing on you big time
They love you WAAAY TOO MUCH
It means that the guy is cute and the girls wish to be with him
Have you had your eyesight checked lately. It is so highly unlikely that all college and university girls would blush, much less for the same thing (or person), it could be described as 'never going to happen'. You are obviously focusing on a limited number or type of girls. I know more girls of that age that would never be inclined to blush at any guy than would; they're just not that easily impressed. They actually have bigger ideas about life.
He's the ultimate hunk
it means that they fancy him
usually because they all find something intriging about guy, but I doubt if all college girls blush at random when they see a guy, unless of course they like him.