No one but him knows that.
First, Breathe! He probably just figured it out. Sometimes boys do that!(assuming you are agirl, you sound like one). second, talk to him privately and ask him not to tell anyone, for your sake. If your ex-crush knows you now crush, get him to help!
well if you dont want your crush to know i suggest now but if you do go riight on ahead (:
If you have a crush on a friend tell them that your feelings towards them have changed and that you now like them don't worry it happens. if you don't want to tell them, the crush might blow over if it doesn't, you should tell him or her :)
Obviously he knows you like him now - you could give him your number and tell him if he would like to go out sometime to give you a call and see what happens.
If you like him I would ask him out while you have the chance... He might like you now but maybe not later in life.
ignore it. he's just being a jerk. but, at least he knows your feelings. now you know who he really is and can move on with your life. even if it takes time.
he does not like you
Just fess up to it... Text him and say it's true I do like you now you know so what... (I'm also a teen this has happened to me too)
he finds your personality appealing, but he just doesn't think you're attractive. sorry you had to find out this way.
I did and now I'm a year into my relationship
Well maybe tell him why you now 'hate' him