-snip-
You and Boltster are going on the assumption that girls just do that because they are. She is quite the selfless person, and will do anything to continue this relationship, as I will do as well.
And excuse me? Better girl? How so? It's her or nothing*. If it doesn't work out, then I can't love anyone else in that way. Both of us have a monogamous nature and take this relationship seriously. We respect each other's boundaries. I don't see it as a lustful relationship, but more of an "I love you because you're you." I'm not in it for the ride (double-meaning, if you caught that), but just because we would like to spend our lives with each other.
Now this may sound like the typical "spoiled brat" scenario... No, I just find myself incapable of loving anyone else.