I haven't read all the posts and don't really know where you're at in life (highschool, working,....) but here goes.
I was once dreaming of the perfect girl like every young kid my age back then. Only problem was that I was the fat kid, I never got looked at except to be laughed at. So I wasn't popular and people were giving me a hard time on a daily basis. This is not a sad story and I am not trying to get you to feel sorry for me, it was my life period.
Although I wanted to be popular and get the cool, beautiful girl I knew I had to change, which I wasn't ready to do. You got to understand something, life is what you make of it and if you try to live it by not being yourself, in the long run it's gonna hurt you.
The people around you are only tourist in your life, don't try to impress them. Most of them will be gone from your life in a couple of years. The ones that will stay will not be there because your tried to impress them with the girls you get or the things you do, but because you are yourself around them.
Anyway the point is, if you feel she is all you want then go for it man. Looks isn't what is gonna make you happy, being with someone you feel good around, someone you can share things without restrain, someone you can count on.
Don't let the chance of being happy slip you by and realise one day (while trying to tell someone in a guitar forum not to make the same mistakes you did) that you didn't had the courage to be yourself ....
Chances like that don't come often. And if people give you a hard time because you're with that girl, look at them very closely and remember, they are not worthy of your respect.