Well sure there are books you can read and there are thousands of videos you could rent, but my question for you is: why would you want to stay with her?!!?

There was not one thing that I read here that would make me want to stay with someone!

Ok lets look at what you said. In one sentence you wrote that she cheats on you but at least she tells you that shes about to cheat on you and you think that that justifies it. I'm sorry but I would NEVER stay with anyone that has cheated on me. Obviously the relationship is not as important to her as it is to you.

She is Brushing You Off

I agree. He should take the hint.

All I have to say is that you should step back from the relationship. She's telling you that she could see herself marrying you, which is just a new version of "you're a really nice guy...you're a really good friend" but she doesn't want to be with you now. Obviously she wants to date around and not settle down.

He doesn't have to go to an adult video section, Barnes & Noble has plenty of books.

But if you are really serious about wanting to "learn" some...uh...techniques then you could either go to the adult section of video stores and learn that way or you could ask the person you are sleeping with what they want you to do to them. If she can't talk to you about it then maybe she isn't the one for you.

If you are having sex with someone then the two of you (or however many there are) should be able to talk about everything together.

But as I said before, I really believe that you should not be with her anymore and that you should move onto girls that can be as into the relationship as you are to them.