Sexless marriage advice ?

So my husband and I have been married for 6 years now, we had a healthy relationship previous to getting married and then things changed soon after. I was almost always the one initiating sex, if I didn’t I felt like he never would try. And fast forward 6 years and two children later we have sex once a year. He shows no interest in me sexually, I know he loves me being the mother of his kids and we do understand each other when it comes to life. He’s such a wonderful human being and I do love to be with him. I love him but obviously I have felt very unwanted over the years, has made me question our marriage, I did gain weight over my child bearing years and he told me he wasn’t attracted to me because I was fat but I have gone back to my normal weight and still no change. He says it’s my fault for things like when we got married we lived in a place that honestly was the hardest experience of my life, I grew up in a bubble and it was the first time I ever really left home, went across the world to be with him and it kind of opened so much fire and anxiety within me. When we had kids, we had no support from family, he lives abroad and comes back on the weekends so I feel like a single mum a lot. And so I got PPD with both kids. So I have had a spiral of things but they’re not my fault. I feel like I’m being blamed for things I never chose to feel or be. And if he isn’t attracted to me at all like why is he with me? We could technically just be friends no? He also has such a demanding job that I know tired him and drains him like crazy but I still feel like there should be some priority in our life for us? It’s so hard to speak to him without him getting snappy and I know it’s because of work stress and not who he is. But it hurts. I have no one to speak to and honestly I just feel like what is my purpose apart from our kids? We don’t go on dates and we never have time for us, he falls asleep by 9, it’s just so many different things. I just don’t find it normal that my husband has no interest in me sexually whatsoever ? Please tell me your thoughts