never tire of (something)
To never stop enjoying some activity or endeavor. Often said sarcastically of someone who likes to do something to an irritating degree. I'll never tire of our long hikes each weekend, Sandra. She never tires of reminding us about her amazing year abroad in London.
never tire of doing something
do something a lot, especially in a way that annoys people: He went to Harvard — as he never tires of reminding us.