I agree with the others... and I HAVE an overweight husband who wanted NOTHING to do with changing his lifestyle. I used him as an excuse for years for why I couldn't lose weight. I made a commitment for me, and told him it was NOT about him. He said, "yep". I managed to convince him to leave his Oreos in his office so I wouldn't see them every time I opened the cupboard. That took a lot of convincing!
We started eating healthier at home, I lost weight. Finally he started letting me make a quick breakfast for him... then snacks... He started making comments about using nutridiary, and I told him he shouldn't do it just because I was... not unless he wanted to do it for him. FINALLY a month ago (after I'd lost almost 40 pounds), he decided he wanted to lose weight too (goal: fit in a shirt he loves), and now we are both losing weight together. It's great!
Even though you love him, you can't make him lose weight. Did you ever have someone tell you you should lose weight? Did you take it well?
You have to do this for you... let him decide about himself. He may surprise you, but you'll have to let him do it on his terms... though if he starts to get receptive, nudging can work...
Good luck!