Firstly- don't feel bad for liking this guy, you've done nothing wrong so there's no need to feel guilty or embarrased. It happens.
It sucks ass when the object of your affections doesn't feel the same, but again - this is nothing to be ashamed of, it happens to the best of us.
It sounds very much to me as though you are making far too much effort. I've been in a very similar situation myself and appreciate how hard it is *not* to text just to make sure they're still interested and want to talk to you.. But ask yourself, surely if he was into you as much as you are into him would he be ignoring you for days on end? Of course not.
Sounds as though he's keeping you keen by offering as little in terms of communication as possible, which sucks for two reasons: 1, It messes your head up as to whether he actually wants you, and 2, it makes you want to chase the little blighter even more. (Been there, done it.) The truth is babe that he's keeping you sweet because you are of some ~ahem~ use to him.
I've had it done to me, and I have lots of guy friends who boast about having girls on the end of a string like this. Sad but true.
True also that when he does want some stringless loving from you, it will get your hopes up all over again just to have them dashed when he decides to avoid you again, you'll end up feeling cheap and humiliated..Don't waste your time with this - You posted this thread, you're clearly not happy.
In retrospect, you uni years are the best of your life. Sounds as though he's enjoying his- don't let somebody mess you about like this and make you unhappy, it's all over before you know it. Be strong, move on and don't look back - Just the advice I wish I could have given myself 2 years ago.
Hope this helps.