Welcome to the site, Inlove!
I am the SO of a MTF who hasn't yet begun his transition (and is unsure whether he is going to pursue transitioning at this point). Susan's is a wonderful place, full of kind and loving people. The support here is unbelievable!
I can't really answer your question since I am not in a relationship with an FTM, but it doesn't sound like something that is too uncommon from some of the things I have read. I am sure that some of the guys will be around to throw in their two cents shortly.
Other than that, I look forward to reading more posts from you! Stick around, don't be shy, and again, welcome!
Hugs,
Jacquelyn