How do you know that you are loved? Can Love be measured?

To me, love is the little things. The little things about trust--a stranger who offers you food because you forgot to bring your own, honesty--the person who is at his deepest times but choose to return your wallet, silence--a friend who is just simply quite beside you while you're crying because you don't talk about it for the moment, and a lot more of the things we both know are valuable. So if you ask me for it is to be measured, yeas and no. Yes, for the things that matter and no, for the things that didn't.