Asked husband if he was still attracted to me...

So, for the past two years almost I've noticed my husband starting to distance himself away from me, become emotionally unavailable, and stop being affectionate. We constantly fought over it every so many months because I was tired of feeling lonely, and he kept using the same excuses: that we weren't teenagers anymore, that he was stressed, this is how marriage is, etc. We've been together ten years, and while I don't expect it to be the honeymoon phase all over again, I feel like there should still be something there. He says he loves me, and that he wants to be with me, but his actions are wishy washy. He's not cheating, I already looked into that possibility.

I recently read a shared article about the signs that a spouse has lost attraction, and it wasn't until I was going through the list that it had hit me. Every. Single. Sign. It was like I was looking at my own life in standard bulletin form. I felt deflated, and in my heart I just knew.

Little backstory. Three years into our relationship, I stopped having periods. Shortly after, I started unexplainably gaining weight. I'm talking anywhere between 5 to 10 pounds a month, sometimes more. Within a year, I had gained a good 100 pounds. I had been to multiple doctors, and none seemed concerned enough to even figure out the cause. They just said I needed to eat less and move more and sent me on my way. At least one had thought it could be PCOS, but when the ultrasound came back clear of cysts, it was dismissed and given the same advice. Now, I know a hundred pound weight gain is a major change, and my husband always seemed happy with me despite what was happening. He never gave me reason to believe that it bothered him. After having my son, I went into major PPD. The antidepressants had caused me to gain all the baby weight I had lost back. Now I was 20 pounds heavier not pregnant. Nothing seemed to make the weight budge either.

I was finally diagnosed with PCOS back in August. My ultrasound showed cysts on my ovaries and my free testosterone was very high. Since then I've been put on Metformin, and have actually lost 15 pounds (yay me). But despite that, my husband's demeanor has not really changed. So I asked him the night before if he still found me physically attractive, and told him to be honest.

He said "not like I did back in high school, but yes, I do." I pushed further, and got the whole "don't be taking that the wrong way. You still have a beautiful face, and I like your ass and boobs. I still find you physically attractive, just not like I use to. There's nothing wrong with you. You're a good wife and mother, and that's enough for me. If you want to lose weight for yourself, go for it." And that was it. While part of me thinks I should accept his answer and continue to live as a jolly fat woman, the other part is telling me he tried to express how he felt as gently as he could without hurting my feelings. What do you guys think? I plan on going on a strict diet and exercise regimen anyways, but do you think it could possibly help in that department as well? Most of my weight is in my stomach, and I know even if I drop several pant sizes, I'm not going to look like I did back then anyhow.