I'm going to type work over and over again so people around my cubicle think I'm working
Why do you need to pretend to work?
I'm tired of listening to my co-worker telling me about her love life.
It is dishonest to pretend to work instead of actually working. You can actually do work instead of pretending if you don't want to listen to your coworker.
I can't work with sexual tension anymore.
Well if she is being that inappropriate you should tell HR. She has no right to talk to you about sexual matters at work. It seems rather hostile to me.