Hey mechakitty,
I actually can relate to your story pretty well. My current partner, who is FtM, and I met at our University's "Queer Gala" (a gross misuse of the term if you saw what went on there), and I meet this lovely person who is biologically female. We meet up the next week, and after a few more weeks, we started dating. Over summer, my partner came out to me and told me that he was actually male, though still pre-transition. I told him that I've been having my own doubts, and ever since, we have been helping each other out through this process. We love each other very much, and we look forward to having a long time with each other. Unfortunately, I am only out to one person besides my boyfriend, and waiting until I am more certain, and he is only out to a few people.
So, if anything, I think that it's very fortunate that you have someone who is also potentially transgender. If you two can get along, than that is all the better! I wish both of you the best of luck!
Vi