She has all kinds of guys wanting her also...
Most Helpful Girl
The way she asked the question definitely wasn't the most sensitive, but I don't think this girl's intentions are necessarily bad. She sounds to me like she just wants to how much you really like her. She probably just needs reassurance before she takes the leap and decides who she really wants to be with (though if she were a bit less of an obnoxious girl she would just follow who SHE likes the most and not need to be like this about it). Challenge her by trying to find out how she really feels about you the same way she is doing. Ask, "why SHOULDN'T you choose me?"
If she has a list of more than one reason, she's picky/too full of herself and if I were you I would ditch her because she'll just end up getting sick of you and hurting you/breaking your heart.
If she says I don't know, tell her that you would make her happy but that you're not going to wait around for her for too long.
If she says something along the lines of "there's no reason I shouldn't pick you", that's a good sign, so ask her why she doesn't already, then. and I'm sure you can take it from there !0