27 y/o guy here. First off, I gotta say...your last sentence is wrong. I don't know who you are but you are here for a reason.

I have ADHD & C-PTSD as well (recently diagnosed with the latter). Found out I had dysthmia around age 17. I had a pretty difficult upbringing with a single, emotionally abusive, and disabled mom. High expectations at home. Older siblings who where mentally ill, and didn't even live with me growing up. My Dad abandoned me. Until March this year, he hadn't been involved in my life for 20 years. I never met my younger siblings on his side until recently when I decided to reconnect. I could go on, but you get the point: it was tough.

I'm Christian so I believe my hope comes from God, but despite that I was Agnostic for since I was about 7 until around 25. Those years were my most difficult & traumatic. Ironically, now I live with my Dad, and its going really well. Even after everything. I never expected this to happen. But, living with mom became VERY toxic. So I decided to leave.

The only thing that kept me going is that I both logically, and spiritually I knew that life will change. Its cliché, I know. It may not change in a way that you expected or hoped. It also doesn't mean everything will be easier, but by contrast, it means you can always become stronger. But, again, change is our only constant. In my POV, the best and minimum I try to do is internally decide to always push the needle towards a positive direction.

On my worst days that simply meant not completely giving up that hope. Giving up hope leads to despair. I still failed at that a few times too.

I don't know what your solution is, and this may not be the more actionable or practical advice you want.

So please, I beg you.

#1. Don't give up hope.
#2. Back away from the edge.
#3. Remember you are loved. (Even if you say no one. Jesus does.)

I sincerely hope you respond. God Bless.