When I used to work at a bank, they would have us study the real currency so we could recognize a counterfeit. That is exactly how you can recognize when someone is not genuine in their love...by comparing it to the kind of love that is displayed by God (real love). His love is a selfless love that loved you even when you didn't love Him. Loving someone by building them up...and helping to meet their needs without expecting something in return from them... is what I'm talking about. You will get something in return....because good things don't go unnoticed...but that is not your motivation for helping them.
Love can be hard work...it means that you are being that person that loves others first...We basically need to display the Agape type of love as explained in this picture.
I pray that I always display that kind of character...the Character of Love.