a_father Don't do that. You can't imagine how weird this would be for her. You live in an absolute parallel world now. When you are free for a while and look back you'll understand. Perhaps you even want to talk with the authorities about what happened to you.
For you I hope your girlfriend is the right partner for life and the marriage is not driven by the abuse of your father. You had no chance to develop your sexuality in a normal way. I hope you don't become the victim of your father for a second time.
If there are nominations for "post of the year" this one gets my vote. Lots of wisdom and good advice in there. Excellent.