My heart goes out to you all, really. Though I don't consider myself under any 'mental disorder', I've had my down days throughout teenhood. Shit got heavy after I caught Pneumonia in late 2012. But I told myself I'd keep going.
My friend, on the other hand, knows this way of suffering only too well. He's had OCD, bouts of extreme depression, and major anxiety and paranoia. And has suicidal tendencies.
High school was tough for many, with plenty of peer pressure coming from the large Honors/AP bracket in our grade. But he'd fret over his grades mainly, then fail to improve them despite studying, and lose interest in anything and anyone. Shut himself away and wouldn't respond. Once he showed suicidal tendencies, he was tossed between ineffectual psychiatrists and a school board not wanting to ruin its record nor take action. With no trust in any authority and with parents who didn't know what to do but berate him, he nearly lost it.
And this happened over and over. He didn't learn, chose not to restore resolve, and lost 10/12 of his friends and his gf. Grades still not satisfactory; nothing else changed for the better except for more trust in me for sticking with him. I don't know how he stays stable in between bouts.
I could tell him to suck it up, or reassure him that all's right, and make no difference either way. He's at the point of accepting this way of life, though there were so many points he could have dug himself out of a rut, but lacked the resolve. I don't want to accept that he's a lost cause, but all the perceiveable options have run out. What do I do or tell him before the next crash?