SO told me to get a gym membership

Since we've started dating, I've gained 60 pounds. I know it horrible. I just graduated from college. I've been waiting to start working out after I finished because the beginning of the weight loss journey is always stressful for me.
Today I was in my lunch break for work and I was also on the phone with him. I had 15 minutes to grab lunch, so the quickest thing for me to grab was a burger. He was like, " why in the hell are you getting a hamburger??? You are not going to do anything to burn the calories!" Then he went on saying how lazy I am and said I need to get a gym membership. It's true but it's the way he said it that broke my heart. It just makes me feel like he has a problem with how I look.