Did you ask your boyfriend to "help" you? or does he think it's his place to tell what you should or shouldn't eat? I mean did you say something like, "Honey, I REALLY want to lose weight and I'm having a hard time giving up desserts, will you help me avoid them?" Or is he being a male shovanist and wants his woman "thin and hot" ? If it's the latter, get used to it honey, because he'll never change.
I dated a very overweight guy once back in college and at the time I was probably around 170 pounds (and always on a diet), and he was probably 300 pounds. He'd eat dessert but lecture me almost any time I ate anything...Thankfully he dumped me when I gained 10 pounds...lol