What do you do when home stops being home?

I’ve never been in hostel or PG. Even when I was married I went to my childhood home which feels like home. Like relax and have all your guard down. Now having been away from home for 1.5 years ( and living with my boyfriend) home isn’t home anymore. It’s my parent’s place that I visit. I feel guilty that this happened. Has this happened to anyone else? How do you cope?