Anyone here stuck in their relationship because of kids?

I am 37M. I have been with my GF (34F) for 10 years. We have a 5 and 1.5 year old together. Our relationship is pretty much co parenting. We have sex maybe 5-10 times a year and our communication is mainly about the kids.

I have turned numb when we argue and barley respond back like I use to, mainly because for the kids and for my sanity. We're not married and I have spoken to her about separation a couple of times but some how I cannot picture my life without my kids. I honestly want this to work because I love my kids so so much.

Not sure where life will take me, but it is normal for us to not speak much. I think she feels the same way, but because of the kids and I am the bread winner (I pay for 90% of life essentials like mortgage, utilities, etc) she stays. I am just disappointed TBH. I thought I can have a best friend for a partner, someone to laugh and be silly with sigh.

Anyone in here in a similar boat?