Thoughts?

So I’ve gained weight recently, I’m 148. My bf tells me not to lose weight because he doesn’t like skinny girls, but I just wanna be healthy and be the weight I wanna be. So I insisted on staying the weight I am if he likes it. He’s always looking at skinny girls and in public he always and I mean always looks at girls that are skinny and have nice bodies. Like, looks for a fat min. I just feel insecure :/. He tells me he loves my body which I hate my body but he likes and looks at other girls bodies