Maybe

Dear me,
I know how you feel. Broken, worn down, unloved. Trust me, I know. It's like your soul is being torn apart by little thumb tacks, like your brain is being beaten with a bat. You're exhausted, you're done. Death is your only escape, but not now. You can't die now. Just know, that one day, you'll have to pull that trigger.
Sincerely,
Happy Birthday... to me...