The Greeks had several words to better describe different types of “love” that occur:
Agapē-is the godly love-unconditional, based on principle
Storgē-is familial love-the love we have for our children
Philia-is a non-sexual love-love of friends 
Eros-is sexual love between people
It seems than many people confuse what love is. Even as concise as the ancient (and modern for all I know) Greeks had it, there still is no easy way to define all aspects of it.
There is no ‘set’ definition that fits all, so choose what you can and enjoy what you have. I know I have and always will have all aspects.
Especially Eros