Only Words

If every day someone were to come up to you and say "you're my best friend" you would know they think of you as their best friend.
If every day someone were to come up to you and say "you're my best friend" and you two hung out every day after work for an hour for a year. You would know they think of you as their best friend.
If every day someone were to come up to you and say "you're my best friend" and you two stopped hanging out every day after work, but now only once every three months. Would you still think they think of you as their best friend?
You would know they take the time to tell you that you're their best friend but when the actions that hold meaning stop, and only words are left, what do you infer?

To go farther...

If every day someone were to come up to you and say "you're my best friend" and you see them go off every day after work with someone else, doing something that you once did with them every day, do you still think they think of you as their best friend? Or do you think they're just saying it to make you still think you're their best friend?

Love is very much the same.