Hi
@Gabekka
Having just gone through the same situation with my wife (been in a nursing home for just over 4 weeks, where she's settled in well), I too am finding adjusting to a "single" life very hard.
As I developed a social life for us both at the start of our dementia journey 6 years ago, based around a local family run pub nearby, I am lucky to have a great bunch of friends that supported us along the way and are now there for me.
The thing that's proving difficult to get used to is the emptiness when I get back home. After 48 years of marriage (our anniversary was 2 weeks after she moved into the nursing home), not having her there is heart-wrenching.
Daft things like having all her clothes in the wardrobe, 99% of which she'll never wear again. I certainly can't bring myself to get rid of anything as it would seem like a betrayal.
Obviously I do not know what your circumstances are but as others have suggested, perhaps try rekindling old hobbies or pastimes, reconnecting with old friends etc? It reminds me a bit of what it felt like on leaving school and having to explore the big wide world. Only advantage now is that I have hopefully learnt from my mistakes - time will tell?
Kind regards and good luck.
Phil