Wait it out. Be her friend. Get closer to her. You never know what might happen in the future so don’t hide from her.
Obviously, you don’t want to hang with the gf too much because that’s just unnecessary, but make an effort to get alone time with her. Maybe the more time you spend together, your crush will start to dissipate. Or maybe something else will happen… Either way, you like her. So work on your friendship. If it’s meant to happen, it will. π
And try not to get too down on yourself. It’s a sucky place to be in, but you’re not going to be there forever… I can promise you that.
In the meantime, imagination is a girl’s best friend! π (A vibrator helps too…)