I hate my girlfriend and I am feel trapped in my relationship
Why do you hate your girlfriend?
She's stupid and brings absolutely nothing of value.
If you really feel trapped then you shouldn't be in the relationship. You're making yourself miserable and I'm sure she'll eventually feel the same way. Getting out sooner will be better for both of you.
I need to stay in this relationship. If I left it will be bad for my reputation.
Does your reputation matter that much to the point you are willing to be unhappy with someone you don't click with? I feel it's best to just break up, because even if you have a reputation now, you aren't any happier. Perhaps this will lift a huge burden off of your shoulders.