<human>: I[22] started having sex at 15 and have enjoyed exploring my sexuality since then, this is my first real relationship. I met her[20] at college and fell for her right away. She was brilliant, funny and we had so much in common except when it came to sex because she was a virgin. 

..at first, I was very happy, one thing a lot of guys like is innocence in the sex department and the idea that no other man has been with her, I know it's weird but those things went through my mind. I thought it would be hot teaching her the robes and all that and it was!
for a while but there needs to be interest in learning.

We didn't have sex for almost the first 5 months which was fine, porn got me through the sexual part of it and she was more than enough to satisfy the emotional side of a relationship because she is an awesome person.

We had sex and it was excellent, she was a bit timid but I made sure she felt comfortable and it was good for two months. 

...in the beginning it was great, she is so hot and the connection we had is spiritual but after a while of the same position(guess which) it got a bit boring, I mean I was cumming but it wasn't getting anymore exciting and she had always said no when I tried to change into different positions. She likes eye contact and it is great but a guy needs some variety.

I asked her when we were not in bed weather we could do some other stuff like doggy style, 69 and even that was too much for her and she feels it's too impersonal, we've had a few minor fights over it.

...a nice body and a certain kind of sex can only keep the interest of a guy for so long. I need more but I don't feel like it's going to happen. I love her and I think she is the greatest person I have ever met but our incompatibility in the bedroom is killing us.

How do I talk to her about this in a constructive manner?

Could you distill the essence of the text into 1-3 sentences?
<bot>: My gf wont do any of the stuff I want to do in bed, and it's getting to the point were I'm ignoring her good parts and am ready to leave.