Love must be sincere. That phrase seems obvious; it would not be love if it was not sincere. Would it? By definition love must be real! It is almost too easy to tell somebody we love them, without really considering what that means. Often we use that expression without thinking.
Because you love me. In Heaven right now, the Lord is saying your name, and is pleased that you love Him. Isn't that a wonderful thought? Maybe you don't think you love Him enough, or maybe you would like to love Him more. We can all love Him more than we do.