I doubt if you can change her mind.
How to help a girl become my gf when she thinks I'm a pervert?
I would concentrate on just being yourself and allowing her to see who you are as a person .. Mind you it would also be advisable to curb your tendency to display undesirable behavior. Don't concentrate so much on "making her your girlfriend" .. If you can cultivate some level of trust .. Then and only then, will you have even a remote chance to make a favourable impression on her
It's hard to change a first impression. Why does she think you are a pervert? Maybe you need to start asking yourself that question.
Well you can start by either lying or telling the truth depending on whether or not you actually a pervert.
Just continue proving her that you are not a pervert. Show her that you are sincere, do things that can make her happy.
mate... You stuffed up... Big time
Might want to consider looking for a girl who do not mind a little perversion . . .
Also, what makes you a "Pervert" in their eyes? . . . It might be simply that they are a prude.