You don't necessarily have to get that close to other people. But your wife probably shouldn't be your only friend, either - or you hers. You can squeeze the life out of a relationship trying to make it the one and only thing in your life. People can't be that to other people.

Instead, have your wife be your best friend. That's wonderful! But also have other friends. Keep making new ones as old ones drift away. And keep the friendship with your wife alive.