I'm 47 and want to feel happy again

[Scotcousin]

I really haven't bounced back after a horrible breakup last year. Before this almost 5 year relationship, I only had one previous two-year one in my early 30s, so I'm well used to being single and spending time alone and enjoyed it. However, I now feel anxious and on edge a lot of the time and find I over- think and ruminate if I'm on my own for too long. I used to love reading but can't concentrate too long on a book now and feel I waste a lot of my free time. I had stopped doing a hobby after breakup but have recently resumed, but having to really push myself to go. I feel negative a lot of the time and am getting little enjoyment from anything really.

I'd love to hear from others who felt similar and managed to pull themselves out of a slump. Thanks.

For various reasons I am alone a lot. I hear you on the anxiety. Things I do alone:
Walk a lot in beautiful parks with podcasts to stop overthinking
Swim
Visit museums and galleries ( am in London).
I write books in my spare time ( not popular ones, more niche) and my sister paints
Cuddle my cat

Things I do with other people that have pulled me out of the slump
Book club
Walking club
Volunteering at a heritage site ( also considered cat shelter).

Yes, my hobby is with a walking and hiking club, which I've recently resumed, and I do feel good after that. I think my self-esteem was low after breakup and that's one of my main problems.

I find volunteering very good for my self- esteem. People tend to be kinder, gentler and very grateful for any help.