My boyfriend rated me a seven on a scale of ten?

So I was sitting in the school cafeteria and this classmate of mine passes by when my boyfriend who was sitting besides me told me that she was a nine on the scale of ten. Then he turns around at me and tells me I am probably a 6 or a seven at most if I lose some weight (I am 5"2 and weight a 100 pounds but I have quite some belly fat that can be seen in the shirt). That really hurt me. I usually don't like comparison between two women but now I feel like I am not good enough. When I tell him he just laughs it off saying he was trying to make me jealous but he does this on several occasions where he compares me to other women. What should I do?
(I added the poll option by mistake)
_______
_____---
Select gender and age to cast your vote:
My boyfriend rated me a seven on a scale of ten?
Post Opinion