Do you tell someone you like them or do you wait till they tell you?
No, you tell the person because how do YOU know if she or he likes you back or not. Even if that person isnt attractive to you, they can fall in love with you.
While your asking this question someone who likes you is asking the same thing in their head. Fire away!
Well it dependsAre you friendsHow long has it beenI did on on valentines day turns out he liked me back