Just need to let it out

I've been talking to this guy for 5 months. We weren't together but I fell in love with him. He knew and still knows that I have these strong feelings for him and even admitted to loving me too. I've done things for him that I wouldn't do for anyone... not even a boyfriend. Just recently he got with someone.. and it's not me. I was sitting there chasing after this guy and got nothing but broken. He wanted to tell me the truth because he didn't want to hurt me but I still got hurt. I hide behind a smiley face so he didn't know how much it killed me. I cried myself to sleep and started hyperventilating... I mean I could barely breath because of it.. falling in love is like dying a slow death.