One thing I want to note is that while God created you a woman and while He definitely does not want you to sin by forming immoral relationships with anyone (whether it be a man or another woman), there are many different things He could call you to do or be.
I may be somewhat too liberal, but I personally believe that not every woman is called to get married and have kids. That's just my opinion, but I think it is limiting God to say that He made all women for only one set purpose and calling while He made men for all callings and purposes.
I'm personally disgusted with the stereotype that a Christian woman must be more emotional than logical, must be the nurturing, nesting, at-home type, must find a man and have kids to truly be happy, and must be "feminine" according to the standards of those around her.
Personally, I believe that I'm called to celibacy (i.e. not being in romantic or sexual relationships), to helping others, to doing well in the field of work that I choose, and to above all else live a life that shines the love of God. . .even if I'm nowhere near the best reflector of Him LOL.
I don't like fashion, gardening, cooking, or much other typical "girl stuff," while I do like anime, sports, video games, travel, and other typically non-gender-specific pastimes. I find most "women's prayer books/devotionals" to be irrelevant to my life, and I'd prefer touring a museum or library or going to a baseball game to shopping or going to a home improvement and gardening show. I don't think any of that makes me any *less* of a woman, it just makes me less of what people assume a woman is. And I've always been one for not liking assumptions. . .
As for your boyfriend, if you really don't think you can be a good wife and mother (since IMHO those things go together, getting married and refusing to have children is selfish and not giving of yourself)-tell him that. If he's mature enough to understand, he will, and it will be a huge burden off of your mind-and if he's not mature enough to understand your feelings somewhat, he isn't the kind of man you'd want to marry even if you *did* feel that was your calling.
My point (one that I've learned myself in the hardest ways imaginable) is that while you definitely need to resist attractions to the same gender as they are sinful, don't let
anyone shove you into a mold (even a "Christian churchwoman" mold) that isn't what God has in store for you personally.
If you force yourself to be something you're not (i.e. interested in guys, more culturally "feminine," and so on), it does no good for anyone involved, and even if you succeed, you'll "wake up" sometime and wonder who and what you really are or were.
My best advice for you right now would be to step back from all romantic relationships for a little while and see what you really feel called to in life.
-^.^-