Something They Didn't Teach Me at TEFL

Among other things, what to do when you get this text message, as I did about an hour ago:

Hello teacher im your student I have a truth that i want to tell u Do you have any girlfriend? Hope no coz i love you really Let me know your feelings

I don't even know who the student is. I only gave out my cell number in the first place in case the students had any questions on the upcoming exam.

In any case, it's a dangerous situation on a number of levels. I'll have to defuse it carefully.