Hey leecamowol,
I think that what is happening is that you don't want to get hurt. Therefore, if you only have sex and don't get emotionally involved it won't happen. Having lots of sex can be a fear of intimacy which sounds ridiculous but is true.
Also you are feeling as if you need to 'catch up' on the time lost at University. I had a 'mid life crisis' - that's what I call it anyway! I felt as if I had missed out on my teenage years as I had my first child at 19. I regret a lot of it now but I can't change it. Think how you really feel about what you are doing. Be very honest with yourself, which isn't as easy as it would appear, we all lie to ourselves!
Take care, good luck xxx