Hobo - Just Jess is right, it's just a little bit of time yet, things will keep getting better as long as you keep open the lines of communication!
Also I sort of feel the same way, I think objectively my SO is a more attractive female than I am a male but to her apparently she does not feel that way. It has taken me some time to get used to that but I feel totally secure now
Just give it time, keep talking, and do not try to control her, as JustJess said, but if she cannot respect your feelings also by talkign to you about it and trying to help you, there might be some problems. This however does not justify you if you were to try to control her or be mean because she finds other men attractive. Work towards a favorable balance in which the two of you can express how you feel to eachothother without making anyone uncomfortable.