A wedding ring, unless you marry for reasons other than love.

Love is supposed to be a stronger emotion than like, but they are often used the same way with no real difference. "I like these french fries!/I love these french fries!" This would be an example of where there's no difference. The biggest difference between like and love comes when talking about a boyfriend/girlfriend. To like someone means you hang out with them and are fond of them. To truly "love" someone means you're willing to devote your life to them.