My boyfriend calls me his 'chubby hunny'...?

My boyfriend and I have been dating on and off for a year. The only reason we ever break up is because I gain weight from eating icecream. I admit that I overeat a lot but I don't feel like i should be punished for my love of food. I think it's really cruel that someone can say that they love you and grope you in the shower almost everyday and then break up with you because you've gained 5 lbs, or 30. I feel like I love this guy and I melt everytime he calls me his chubby hunny. You don't just make up nicknames for just anyone, so I think we might really have a shot. But I don't know, any advice would be appreciated.