Feeling insanely insecure

I'm about to hit my 39 week marker. I'm in a LDR and have been for 5 years now but mutual phone sex has never been an issue. In fact, I think it only encourages more intimate sex when we finally see each other.

But since I was about 20 weeks pregnant, my fiancé hasnt wanted to do anything remotely sexual with me. This is his child and by all means, the changes in my body I never asked for. I haven't got stretch marks on my stomach, but Ive gotten them on the back of my thighs, some on my butt, and I've nicknamed my breasts "tiger tits" now. By every sense of the word, my body has changed. No longer do I have a tight toned midsection or perky B cups. It looks like I've swallowed a tiny watermelon and I'm strutting a strong D cup. My butt sags a bit now and I can clearly see a bit of chub around my face....

Still, through all of this, I figured my fiancé would find me attractive. Lord knows I have never not found him attractive. When we got together, both of us were very fit and active but through the years, he let himself go and gained probably 50 lbs and yet, I've only loved him more. It doesn't matter how his body looks or what he wears. to me, he is the most handsome man that I've ever seen. & it pains me that it's not the same for him.

This is just a photo of me for reference...I'm only 18 and even with being 9 months pregnant, I get hit on by men at the store all the time. I dont reciprocate as idon't have eyes for anyone else but my fiancé/baby's father... I just don't get it. I don't get what I'm doing wrong.