I'm so frustrated. I'm thinking of all the times my SO cheated on me and it's making me lose hope in my life.
Why would you want to lose hope?
I think it would be better if I died. Then I wouldn't feel guilty.
I'm really sorry that your SO keeps cheating on you, but suicide is not the answer. You should break up with them and get counseling right away.
I have a plan to kill myself.
You shouldn't kill yourself for anybody. Please talk to someone before you do anything rash. There are suicide hotlines you can call if you need to speak to someone right away.