Broken hearted!

I feel so hurt right now can't believe that my ex boo change for the worse. He stop going to school. Always smoking doesn't do nothing, but work and go chill with friends. Got in trouble two days ago and when I text him he seems different. He is not the guy that I fell in love with when I met him. I don't know what to do I wish I had someone to give me an advice that will give me a WAKE UP CALL TO REALITY!