First, you need to figure out what you WANT from the situation. What is the most DESIRED outcome?

2ndly, if it were me, tell your girlfriend everything that you have posted. One thing I have learned over my.. umm.. 14 years of existence *cough* is that COMMUNICATION IS THE KEY!!!

You want to let your girlfriend know everything so that she doesn't think you're trying to sneak things behind her back. Oh, yeah, try eating the girl out a good 30 minutes before you bring anything up