7 years of marriage

When I first met my husband (who is 10 years older than myself) I was 19.... we got married right before my 21st birthday.. I was his works and he made sure that I knew it. He was so tender and patient and gentle, hilarious and supportive.... fast forward 7 years and I feel like I don’t even know that person anymore... we have two children, I’m a stay at home mom and he works his a** off to provide for us. He’s a good man and I should be extremely happy, but I’m not. I am so grateful that I get to stay home with our children and I’m so grateful that he is such a wonderful provider, he works SO hard. Emotionally I feel tapped out. Isolated from being with the kids 24/7 stuck in our house during these winter seasons in NY, I feel alone because when my husband gets home, he too, it tapped out and doesn’t have the energy for me. Oftentimes he’s leaving to go to the gym and when he gets home we just go to bed. I’m not excited to see him anymore. We’re basically living together, and that’s it. I’ve been told this is an extremely hard season of life with the two littles, and I’m holding onto my marriage for dear life because I do honestly think I found a gem for a husband. But help me get through this season? I’m stressed, he’s stressed, we’re not connecting at all... it’s been YEARS. I need this to work. But I’m a mama and I need to feel ok and solid for my entire family. How long will it feel this way?