Marriage

So I married my husband in August and we have a 1 year old son, we have been together 4 years but I just feel like an old married couple, we barely talk we barely have fun there’s so much argueing, he is stressing about money (completely understandable) we are struggling at the minute but I feel like we are both unhappy. I keep asking if he has met someone else and he keeps saying no don’t be stupid. He met me when he was with his ex the mother of his 2 kids who he was with for 10 years so that’s sometimes on my mind. I struggle with depression and have found the past year very hard but I feel like he is too, which has meant that we are both drifting apart. I love him so much he is everything to me, but i feel like what else can I do? I’m so insecure, he left his ex because they argued a lot but he also said since she had the kids she got fat and he used to get home from work and she would be in her pyjamas with no makeup on and makes no effort. I used to be tiny and now I’m not ive out on weight, he makes comments sometimes and it makes me feel shit, he always goes on about fat girls and makes comments about the fit ones, which I look nothing like. When I tell him how I feel he goes mad and says oh well I’m obviously not good enough for you. I feel lost, like I feel ugly, unhappy and I don’t know what to do. He’s my husband I married him because I love him.