Im confused! Girl help needed! I think she likes me?

this PAST WEEK a friend and i have been messaging each other during school more often, whenever we walk past each other in corridors we've been bumping into each other and when i went to the toilet during cl i was gone for about 10 minutes but she messaged me asking why i was taking so long. other than that she hasnt given much alse away. We've been friends for about a year now but not close friends....we're 16 almost 17