I rehomed my dog for his own safety… and I’m regretting it so much.

He got attacked by a loose dog at my apartment complex, and I had to kick the dog to get it off him. The owners lost their shit and have been threatening me since. So I rehomed him for safety. I didn’t want to, I wanted him. But that dog and owners live in the same building and they are aggressive…. I am monitoring the shelter he’s at looking to see if he’s been adopted he hasn’t yet and I’m both relieved and mad about it… I love him so much.. I feel so guilty I couldn’t keep him safe, that I failed my duty in caring for him.