I have been in a similar situation myself and its hard, really hard. But if you toughen it out and keep on pushing forward you will no doubt come out as a stronger and more mentally healthy person, just remember to take care of yourself okay?
I feel mentally drained. I can't even remember birthdays and ages anymore. I can't remember anything. I had a perfect memory. I never want to leave my bed because I'm always so drained. And I haven't had a decent sleep in almost 3-4 years. It just makes me think I should just call it quits.
I suffer from ADHD and it makes what you say really relatable, the only thing that matters however is to push, push and push even more. I know what im asking of you is hard as hell and you probably think you cant do it but in the end its all in your head. If you manage to push, and get the ball rolling so to speak it will be even easier to push it and make it roll faster.
Trust me, I know how you feel, and believe me it's not worth it. I'm pretty mentally screwed up. I'm paranoia schizophrenic, have ADHD, and a lot of other problems, but whatever you're thinking it's not worth it. We have to thrive for happiness no matter how difficult it is and trust me I know how difficult it can be.
My boyfriend has ADHD and I have Asperger, but we don't think it has anything to do with our mentality. I've been lacking sleep since my Dad got sick, which was three years ago (he died 2 years ago). I just can't get a decent sleep, and I think it's really taking a toll on me.