Boyfriends and the gym

Does anyone ever feel like heir SO is adamant about you excercising and eating right? I generally do exercise a least three times a week and eat a pretty healthy vegetarian diet full of greens and get my protein as much as possible.  My boyfriend is really into lifting and wants me to be too. I'm not an avid worker outer, never have been. They weightlifting part of me gym intimidates me. I know that ultimately it will be good for me , but I can't help but feel like he wants to change me. When I've tried to explain that I have a history of body image problems and disordered eating behaviors, and that by him bringing this up I can't help but feel hurt and to be aware of that  that when he's approaching this subject. I feel like he doesn't get it, being a guy.  Anyone else going through a similar situation?