first of all, ignore the insecure douchebags who judge people out of their own insecurities..aka the orange hokage...
second of all, you must love your self before you can truly love another, if you do not love your self, you can not be content with nothing, if you rely on anything, human or object, for happiness, that happiness has the ability to be taken away, when it is taken away you will feel as you say, missing someone, you need to be able to be happy on your own, so that you can love more fully, because if you can be content on your own, you will not worry about the pain that can be caused from your happiness leaving, there fore you will be able to love others greater.