Feeling different

Ok me and my boyfriend got into argument last weekend and he said to me I’m not even his type and he really don’t know y he was wit me this long and etc....and regardless I still wanted to be wit him cause I love him and we are also expecting another baby together....But these last few days I just been thinking about it and can’t....I do wanna be wit him but it’s like I can’t change the way I look and now I feel like he will go out and find better behind my back am I just tripping or what??