Am I crazy

Ok so yes I'm already self concous. I asked my boyfriend what type of girls he preferes weight wise(I'm a bigger girl and idk why I asked). He said girls between chubby and skinny. So I said skinnier then me? Him:yes. So I asked if I'm the max size and he said yes. But he says I'm fine how I am and he loves me no matter what. Now I feel like I need to loose weight and my self concousness is getting worse and I'm embarrassed of my body. Am I crazy or what?