>>6I think OP could be any age, and that it's a legitimate question.
There's a lot of relationships that are "statistically" doomed to failure, but in the off chance that it just might work out, shouldnt be a problem?
Also, it'd awkward to be friends after a month of (at least) attempting to see each other romantically. Although, yeah. You ultimately do in the end choose whether or not to stay friends.
Maybe I just have a completely image in my head than Crisis from OP's question. But, under the assumption that you and this girl are relatively good friends and that you've had romantic feelings for a while (as in a LONG while, not like a month) and want to say something to see if she feels the same way, I say just tell her that you LIKE her. If she likes you back, great. If she doesn't, then laugh it off and move on. As long as you didn't become friends with her just cause you liked her, your friendship should stay intact. Rejection is something everyone goes through, so might as well be rejected gently by a friend than harshly by a distant crush.