My husband thinks I'm too fat...?

My husband and I started dating as teenagers. We've been together for almost 16 years and married for almost 6. We have an almost 2 year old son who is full of energy & constantly on the move. While I was pregnant, my husband (who was 6'2" and 250 lbs at the time) decided to go on a health kick and lost 75+ lbs. We've removed junk food from the house, we've cut out most of the red meat, etc. He travels for his job and is away during the week so it is easy for him to jump on the treadmill at the hotel for 30 minutes before heading to dinner. I work 3 days/week and spend the rest of my time chasing around our little guy. I had a few extra pounds to begin with, but am 5 lbs. below my pre-pregnancy weight. (I'm 5'8" and 165 lbs, overweight but not morbidly so) He says I've let myself go and is constantly making snide marks about how I should go to the gym. His looks are always disapproving and now I constantly feel self-concious, even in my own home. I WANT to lose weight. I WANT to be skinny. I just childishly don't want to do it for him. I'm hurt, unwanted, & apparently unloveable according to him. I told him he should leave and go find himself a better model that is willing to put up with him. I don't think he will...but maybe someday. I'm just sad, hurt & dreading him coming home tomorrow... I just want to be accepted for who I am and free to change myself for me. I want to be a happy, healthy family for our little boy.