How can i tell if she likes me?

i like this girl. we both go to unisex schools(sister schools). i have been talking to her and am starting to like her. i was at her school wednesday cause i was coaching a powder puff football game. while there she texted me and said tell them you have to have to the bathroom and come talk to me. we talked for like an hour and a half and now were texting.|||I think she likes you...but maybe just a friend/good buddy ;-)|||ask her out before u get stuck in the friend zone