I can recommend HF holidays. They do walking and activity breaks. I have only done the walking ones, but as a single person I found several others alone or in groups of friends as well as couples. The food is fabulous and you can be as sociable as you wish in your spare time without any pressure.
The prices may seem high but for me were well worth it.
I hope you find something to suit you, you deserve some time for you!
www.hfholidays.co.uk/special-interest/activity-breaks
A thread for people who have been on GN a long time
