Dear lord.
If you want a healthy sexual relationship with your partner, you need to be open with her about it -- to maintain consistent and honest communication is key. Instead of asking NG, you should be talking to her and working out ways to make the experience more pleasurable for the both of you. Basically, get it out in the open and go from there.
The fact that you said you would pull out of the relationship if it "got serious" and that you posted her picture on here for public ridicule makes me doubt that's even worth it, though. Since, you know, people who actually care about each other will take the time to do such things like converse about and remedy their intimate (private) problems. That is certainly not the case here.
The concept of shallow sex is so depressing to me. If you want the truth, I think you should just go back to masturbation and wait for someone you can connect with not just physically, but emotionally and mentally as well. D: