Help! I need an answer and someones opinion about something.?

Ok. Well, this year, there was this boy that i really liked and he liked me back.Well later on the year, he told me he loved me and i didnt say anything because i didnt want to lie to him because i wasnt sure if i did, but i really really liked him.Then, i started becoming depressed in cl and not becomeing fun to be with because i was quite all the time.So my friends had been noticing that something was wrong with me and the boy i liked started drinking.So i cried more and more about him.When he told me he loved me and i didnt say anything back to him thats when he started drinking and so i thought i was the reason too it.So my friend made me realize that if i didnt love him i wouldn't have been cryin so much.So i told him i did love him cuz i did.But found out later when we were goin out, he had a gilfriend.So i started cutting myself.My friends saw and told me i had to stop and that he wasnt worth it.Can someone give advice about stop cuttin and about what i should do about him?