If you have doubts and might regret it, I wouldn't re-home him. However, if you aren't into him anymore, and are going to (eventually) resent caring for him for his life, you should re-home him.
It sounds like if you decide to re-home him, you are going to find a good home, and that's the most important thing for both him and for you long-term.
Good luck on whatever you decide.
Reply With Quote