I love my boyfriend but he makes me depressed?

If your going to hate, don't even bother commenting. K'then, i love him buh he sometimes sort of insults me. Like not on purpose & he does it in a joking kind of way. Like today i failed a maths test and i was not too happy about it. & he goes and says that i got better than he expected. i mean i got like the lowest in the cl? & I know i'm over reacting about everything. It's just that he's the only person i care of what they think about me. He always says that i'm dumb & he has never once complemented me... even though there is nothing really nice to say about me. =/ & I'm not just posting this cause i feel sorry for myself, cause i dont, i just want to get it out, you know what i mean? Cause it is really affecting my life & I have harmed myself over it before.