Since you didn't really start by saying that you liked her in your post I'm taking it to mean you weren't really fussed until recently when she's started talking to you. It also doesn't sound totally convincing that she's actually after you. It's up to you naturally; personally I don't think I would have been arsed with the hassle of the whole situation. Doesn't sound like it could develop into a serious relationship much but you never know, and if you aren't really looking for one then maybe another fish would be better for everyone.
You won't be able to reload your previous save to snag that Bros Before Hos achievement though.
You won't be able to reload your previous save to snag that Bros Before Hos achievement though.