Cos he made me feel like crap and not good enough and he has huge issues which I no longer have to deal with. They will one day be someone else's problems.
Also better off as I now get to do things I want to do, don't have to watch shit movies, more time surfing and spending time with my friends, more time to concentrate on my studies, more time to travel wherever I want to go and lots of time to start loving myself again and rebuild after he shattered my self-esteem.
Some people are drains and some are radiators... Keep clear of the drains and hug the radiators!