I'll be the voice of dissent here, at least to a limited degree. It is great that you are not intimate with each other, in that the absolute worst thing to happen would be for you two to have an unwanted child together. There is another thread with a similar theme where they did have a child together and are now bound together in some fashion until the child is grown, and it is good that situation is something you can avoid going through. If your relationship can't be saved, you can just go your separate ways with no ties (and no collateral damage to others either.)

However, I wouldn't be so quick to dismiss your relationship, at least yet. Give her some good, factual information about heterosexual TVism. Give her some time to think things over, you are not going to be married or bound by a child together, so you have plenty of time to talk and think things through. Love is a wonderful thing, and a rare thing, and your relationship could be worth saving. One thing I agree with everyone on is that your TVism will probably not go away. You are very out about your dressing (and you have incredible courage to do so!), but I'd be careful; one thing that may bother her is that she may be embarrassed by it being so out there, it doesn't bother you but it might be hard for her to take the guilt-by-association, so to speak. You also don't want the "crossdresser" label to follow you are everywhere, especially at a workplace (if it can be used against you, it probably will, as my former girlfriend used to say), so please be careful. (I don't know what your field of study is, but if you can work with trans people, as I do, it may make it easier.)

Remember, you did the right thing and told her, and you are allowing her to make up her mind. It was the right thing to do, even though it may be very painful in the present to lose her. You can read all about the disastrous consequences of not telling before marriage and/or children all over this board. You did the right thing, and you certainly deserve credit for that.