Is my girlfriend just being mean to me or am I just being stupid?

Wow. Dude she sounds like such a *****. Here are the reasons. 1) she gets mad at you for looking at a magazine. A MAGAZINE. 2) She tries to "get back" at you by doing something that actually is wrong. 3) She tries to make you feel bad about everything. 4) She doesnt respect what makes you uncomfortable. 5) She doesnt seem to care about your feelings at all. Grow some nuts, and have a mature talk with her. If she is still acting like a *****, dump her. Toughen up guy, you gonna let this girl push you around the rest of your life?