Hi mirela,
I know exactly how you're feeling, I was left with no choice but to have my dog rehomed after my ex husband and I split up.
I went around the locals vet's and put signs up and also informed the dog kennels I put him in when I was on holiday so they could keep an ear open. The kennels called me a couple of weeks later and said they had someone who was interested. I met the woman and her 5 year old daughter at my house so they could see him. A few days later I went to their house to make sure it was a good size for him (and the garden) and then we agreed that she could have him for the weekend to see how he would be around her daughter and vice versa, which was all OK.
The weekend after that was the weekend that he went to her permanently. It was the most gut wrenching experience of my life (even more than the relationship breakdown) and not something I ever want to experience again.
My heart goes out to you, if you ever need to talk just mail me at
[email protected]