If you love someone is natural and spontaneous that the relationship with this person helps you to find yourself. I think it is one of the characteristics of love: that does not set limits but makes us grow, and gives us the wings to fly high. But if you feel an emptiness inside of you and uses a person to pretend to fill it, then maybe it is not true love. I wrote a page about what I think of love, and I also speak of this emptiness ("What Is Love?").
I think it's healthier to find love within yourself first. This, for some, is not an easy process but once you find acceptance within yourself and find acceptance for all the great things and even for the bad, then you can experience true love with another person.