Im so depressed and can't understand why?I'm 28 male getting married in 5 months.as of late all I want to do is go out and drink and take drugs and I've never been like this before.Ive cheated on my fiancée several times when I'm off my face and I hate the person I've become.I was out on new years eve and left my fiancée and went to a party didn't return home until the next night totally out of my head.last night I told my fiancée everything I've done and how I feel I get so depressed sometimes I don't want to go on.I hate what I'm doing to her and my family.there is days I'm happy and days I just want to beat my head against the wall please help