Genuine love usually exists between members of a family, but if you're talking about romantic love between two sweethearts, I'm not so sure.
It does exist, your mother and your father or your grandmother or grandfather is the proof. True love is about meeting each other expectations and loving each other with trust acceptance and support. True love is treating someone with kind the kind of respect that they deserve.
You can feel or test the true love when you are into a bad situation.
In bad situations you can feel who loves you truly and unconditionally. This is the way how true love exists.