relationship help?

i’ve recently found myself in this situation with no one i can really talk to about it. i have been with my fiancé for 4 years, and we have 2 kids together. he is kind and a great dad and i know he loves me in his way, but i am unhappy. i crave intimacy from him, emotionally and physically, that he just seems unable to give. we have had numerous talks about this, and we seem to be on the same page, but it just seems like he is either unable or unwilling to change. it’s like he’s just constantly disassociating when we are together, and it’s at a point where i feel like we are just friends or roommates, i feel nothing romantically anymore. i feel like i am doing all of the emotional labor in this relationship. but i don’t want to ruin our family. i am at a loss for what to do. i guess i just need advice, stories, or validation?