i like one girl but i do not know she likes me or not?

first you do a part of yours like: call her every day 3 to 5 times but do not over 5 times and meet her if you were free, say to her that how much you love her and talk about things what she likes, if she was so happy when you guys have been meeting together, thats could tell you she does love you!
another way is leave her in a short times, do not contact her in any ways see if she could not lives without you.
usually a person loved by someone she/he feel that the one should does it for herself/himself, but once you stoped call not meet her/him, she/he will be feeling lost something,
if she really love you she must wants to get you again!

try to phone her sometimes to see her response first
If her do not feel u MA FA, u can try to send sms then start to date her for lunch or dinner.
This can improve your friendship or communication.