Confused about masturbation?

I'm 15 and a Catholic male. I, like most other boys my age, like masturbating. However I feel really really guilty about it. Likewise, I feel like bad things happen to me after I masturbate because God is punishing me for sinning (masturbating). I've read alot and most sources say its a healthy and normal thing for a human to do, whereas the Catholic Church says its very bad and sinful. I still feel really guilty, but at the same time I still want to masturbate. Help? I want realistic views and not just a bunch of Bible quotations.