help, so upset

I went anonymous because I thought I'd get a lot of hate for this. my husband and I made the tough decision of rehoming our dog. we live on a farm with so many cats, and he has a high prey drive towards them and was just continually injuring himself to get to them. we found a family that had just lost their dog and they drove 5 hours to come meet him. they fell in love. it was the hardest decision of my life, has anyone had to do this? how do you get over it?