What if I told you I don't want to compliment my husband's weightloss?
Why are you not gonna compliment him?
He's still so fat it's sickening, I can't stand to look at him anymore.
I agree that there are aspects of someone that you have strong opinions about, but your husband is definitely doing something about his weight and it is wrong of you to not show your appreciation towards that effort. Make sure that you compliment his weight loss, and help him along the way if he needs any help from you.
What if it's just an act? I don't trust him at all.
I'm sure that it's not an act and that he's really trying to lose weight. It's important for you to encourage him to do so too.