My housemate acts like he's disgusted by me :/ why? what should I do?

My housemate can be nice/caring but sometimes he is really mean.

Also I feel like he has insulted me on several occasions, I feel ugly/unattractive as it is but he always has to have digs at me about it like, we were walking with our other housemate and she said to me about my dildo in a jokey way, he turned around and said "I dont wanna know, I never want to think of her like that AT ALL"" and acted so repulsed it made me feel like a disgusting peice of ****.

It isnt the first time he has done that, he said it once when I mentioned fishnets as in the tights, (just a convo with another friend ) he was like I DONT WANT TO KNOW! and again he made a joke about his male friend getting turned on by me and said it was disgusting.... like Im so vile no man should ever want me...

I know Im sensitive but it hurts my feelings... he would joke about those things infront of me about himself and I dont say things that harshly, like i might say ok too much info but thats all.... am I over reacting? why does he have to keep reminding me how he views me I get the point....