<human>: So, I have been dating a girl for four years. I just want to say that she is wonderful. She is beautiful, a great person, and a great partner.

We started dating when we were very young, I had barely turned 13, and we were both at lows in our young life. My Grandfather had passed away, and my parents split up only weeks after. Everything was going wrong until I met her, and I obsessed about being with her. After I finally had won her over, I knew already she was going to be a long term thing.

We dated for 3 years without issue, every day I woke up I wanted to see her. I would call her often throughout the day and tell her I loved her, and she was beautiful. We did everything together. We were almost like great friends. And that's the issue now...

I think that I may have been young and dumb, and mistaken it for love, when we really our relationship was more of a amazing friendship. 

Last year we began having sex, and things seemed to be perfect. I thought that we had matured and we were for sure meant to be together. But over the last half a year, I am around her and I realize we are different. Now, I have trouble keeping my temper down with her, I am extra interested in other girls and I feel like we've trapped each other.

She has talked of going away to college, and I am fine with that, more than fine. I find myself wishing she would go and forget about me. However, in the next second it gives me anxiety thinking of not being with her.

Recently, like the last month, I have started sneaking behind her back, and talking to girls from all over. She does not mind if i have friends that are girls. But I want to be flirtacious always. I am not a cheater, so I refuse to cross the line, but I have the urge to always.

What is wrong? Is it me, is it us? Is this normal? What should I do?

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: I feel like I want to cheat and separate from my girlfriend, but in the next second I am afraid to be without her.