Depression ruining my relationship

Ive been with my boyfriendfor 6 years ive had depression since i was a early teen i had really.bad months were i wouldnt leave the house at all or shower or do anything at all. I started getting better.around 17 but when my grandma died when i was 18 i went down hill again i met my bf at 19 and told him about my mental health and i do have.really bad times but do get better. He helped me.loads and i was getting better but i got ppd when i had my first child at 20 I was really bad for about 6 months he helped me through it. I was great.till i had.my.second child 2.5.years ago and got ppd again he didnt help me much then as he didnt have the patience for it but i got passed it quickly. But the past.6 months i went bad again and he is always angry.with me a.short fuse and anything i dont.do like.tidy.up i get.shouted at as he works from 9 to 6 5 days a.week.so.he is tired when he gets in and doesnt want to do it i have been to the doctors for.tablets helping a little bit but still not fully normal. He messaged me.tonight asking for a 'break' till i get.better.or.when he is ready.to come back i dont.know what.to do he is normally so kind and patient ive known him since we was very little. He is a.different person