Should I stay alive?

My life is going down the drain. People treat me like im a s** toy. They laugh at me when the tears roll down my cheaks. I cut my self in weird places so people wont relize what im doing. I do all the wrong things and i dont know if i should keep doing what i do. I get used. People trash my feelings. Boys dont want me. My life is falling apart. God probaly cant forgive me from what i've done. I commited adultry to my future husband. I dont know what i should do any more. Ppl keep yelling at me..