She is probably very shy, so you have to read the signs, does she call or text you? Does she want to hang out with you? Does she invite you in after a date? Does she smile when you are together? Does she give you her full attention when you are out?
I would have recommended asking her, but if she won't talk about it, you will have to go with what your gut tells you, but if you have to question it, it's probably no.
You can tell through her eyes, smile and other body language. You have to study her. Women are different but if she does not talk, then you have to learn what her body language tells you.
you must watch her body laungauge if if you have common frinds ask them what she talks about you. You must watch her very positively whether she have any positive feeling towards you or not