I don't think anyone should feel guilty about going into a separate bed or even into another bedroom in order to get a good night's sleep!
I know, and can see from the comments from everyone else, that I'm not alone in sleeping in our 2nd bedroom. I suffered, for years, with my husband's horrendous snoring and fidgetting but that was in the days when both my girls lived at home and my only recourse was the sofa! Since downsizing in 2017 I have my younger daughter's large Ikea bed to get into when I need to get a good night. Sadly my sleep deprivation has built up over many years and I rarely wake up feeling refreshed even when my Fitbit tells me I had a good night.
We were both referred to a course at a hospital to train us in sleep hygiene and sleep strategies. Whilst it makes sense not to use a computer, mobile phone, etc., before bed, we tried this strategy but didn't find any appreciable difference in our quality of sleep.