Originally Posted by kuroki-neko
im not sure if this is relevent but im her first boyfriend. the thing is when she is acting normal she and i get along fine, but she is has very low self-esteem about how she looks. in thus she thinks that will leave her for another girl that "looks better".
All you can do is reassure her that you love her and think she is beautiful. But it does come down to a matter of trust. This is about her, not you. If she can not bring herself to trust you, then there is not much you can do. Only you can decide when/if her insecurity has damaged the relationship beyond repair. I would definitely try to keep your mom out of it as much as possible though. When you reach an impasse, I think it is better to say, "We're getting nowhere. Let's take a break from this discussion and I'll call you tomorrow." Then be sure and call her tomorrow!
I don't know why there is a green arrow at the top of my post. o_O?