Did you keep in touch?
I sold my (very difficult) horse last month. He went to a fantastic experienced home with a breeder who is used to challenging horses and can keep him how he likes and I know he will be well cared for with no expectations.
I really struggled with him and he caused so much heartache, but I still feel as though I want him back when I see him doing well.
The breeder is doing very well with him and he has even gone to a few competitions with great results which is making me green with envy. I always knew he was a brilliant horse but I couldn't get the best from him as I didn't have he time or facilities...now he has what he needs he is turning into the horse I always wanted and I am green with envy and wish I had persevered 

I can't get another at the moment, mainly because I don't have enough time or money and also because I want to wait until finances are better so I can compete and am not limited to happy hacking but I do miss horses at the moment! My next horse I want to get from a specific breeder so I can show it to a high standard and want to be able to afford a small lorry or trailer. At the moment I could scrape livery but no extras.
Someone talk me out of browsing horsemart 