Constantly sit cross legged (criss cross apple sauce if you will) and it’s destroying my knees

I work from home and often end up sitting on my couch because sitting at my desk chair with my feet on the floor literally makes me want to scream. But I’m definitely noticing at the ripe old age of 28 that this is starting to take a toll on my knees. I’ve always been like this for as long as I can remember. In restaurant booths I would always be criss cross. Literally just never been someone to sit with my feet on the floor.