A letter: explaining a problem

I’ve had a problem recently. My parents have said that I can’t see my girlfriend again because she is a bad influence on me.

I’m worried because my girlfriend isn’t a bad influence, she’s a fantastic girl and I don’t want to lose her. I think my girlfriend is a good influence on me, because I’m happier. But maybe my parents would be more open about our relationship if I introduced her to them, so they can see that my girlfriend is a nice person.

I’d really like some advice because if my parents don’t understand me soon, I’ll probably go away with my girlfriend.