How not to fall into negativity?

[AngelofRabbits]

Hello. My name is Haley, but please call me Samara (I don't like my human name very much). I'm an Earth Angel. I just found out from my dad the night I turned 16 which was in June. I've learned to accept this, although I keep falling in and out of this violent and negative mind state. When I fall, I feel like I should be a demon, not an angel. I think horrible things and cut myself off from the Angelic Realm. I often have cravings for things of vice like alcohol and cigarettes. It's almost like I have a split personality! I've learned that beings like me are very sensitive to this kind of stuff and will end up doing these sort of things at least once while they're human, but I want to know how I can protect myself from this. It's already gotten me into a mental ward and therapy. I don't want to have that happen again. Any advice?