No, annie, love is not the key to happiness. At least not the physical kind of love you are apparently seeking to find.
The key to happiness is truly within; you need to reach a point where you can wake up, look at the mirror and be happy and content with the person you see within. Love can only grow in a real and meaningful way once you find happiness beforehand. Otherwise, all the relationships, all the possessions in the world will be meaningless.
I do hope that one day you will find happiness AND love.