mental health

how to deal with a partner that has a lot of mental health issues, you truly love them and its really hard to deal with them too because of their mental health disorders, it affects our relationship, he has a mental disorder that he doesnt soemtimes realize is hurting me, I know I should understand but is there a way to make things a lil bit lighter for how they are, he has adhd,ppd and sometimes he won't have any interest with anything at all and he gets like this due to his mental conditions. Im not giving up on him nor planning on to even if it'll be easier to just move on and find someone who I wouldnt have to deal wit this with