The Bible doesn't actually say He was unmarried, but that is what we usually infer from reading it. Jesus came to earth to fulfill a certain mission, which included dying young (approx. 30 year old). He probably never married because He knew that simply wasn't God's priority for Him. But even if...
My sister has a Yorkie that fits your description pretty closely. He loves long energetic walks (he probably covers about 3 miles for every mile the human with him walks) but indoors he's a total couch potato. He's adorable and very smart.