I want to ask a single male teacher in a university, if she likes a female student, how will she behave? Will you pay special attention? Will you take the initiative to contact her? Watching her all the time? If you really like it, you will always come to greet and care in the name of learning from time to time. It's more natural to approach slowly, see her more at ordinary times, and then you will definitely ask for contact information.

If you feel good, you can try to develop it.