Originally Posted by Tensa Zangetsu
That's not even a remotely good reason for her to continuously accuse you of lying and cheating. If she is this paranoid, then its really time to move on. If she has been doing this for a while, and its only getting worse, then you need to just cut it off before she gets more crazy. If you must, talk to her one more time. Tell her that if she doesn't get it together then its over. Like SpazItUp said, no trust means no relationship. You can't build a healthy relationship on mistrust and paranoia.
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".