I THINK LOVE IS COMPLEX BECAUSE OF THE EMOTION AND TIME PUT INTO IT.
It is complex because two people that are in love having different personalities even if they are similar in some characteristics of each other. In this -me- generation it can become very complex where some individuals are more interested in what they want and do not share or care enough about any partner they are with.
Love is so complex because the need to be loved and to care for another outways the need to care for yourself. Only when your love is not returned does the feeling become confused hence the feeling of being unloved when with someone.
Only when 2 people feel completely the same does love last for ever
It is chemistry. When a couple tries to sustain their love on the matches that sparked it they are apt to find it was all just an over rated fling.
One must also account for all the types of love. Family love isn't all complex, it is usually romantic love that gets complicated when the stages are skipped, or one person isn't as deep as the other is. Too many folk these days say forever back to those that say forever with no intent on anything lasting, they just go with it out of reflex, or game.
Even before one can "weigh" a persons capacity for love you need to determine their ability to be decent. I got that from a good Vonnegut novel.
love is complicated coz if it wasn't it wouldn't be interesting
its also the difference between loving someone and being IN LOVE with them