My girlfriend and I don't really do much anymore, but we're both young. Our relationships lasted 10 months, and sex happens at most every two to three weeks. I don't think it's healthy and all the conventional ways of getting your significant other interested don't work on her. After a back massage she tends to nap, and when cuddling gets too intense she seems to want to pull away. I trust her 100% and I know she's not cheating on me or something of the sort, but is there anything else anyone can suggest to bring more sex into our life?

Oh, and I don't think I'm terrible at sex. We tell each other everything and of course if I'm bad at sex she might not tell me, but that may be a problem and I'd be willing to accept that.