True love from false love,
Well, you know when you start to like someone, you get this butterfly feeling effect?
That is a true feeling, it's in love.
Then, when you're in a true relationship, it's not being in love anymore, it's loving another person for who he is, and the will to move on with him/her.
I call that true love. And there's not exactly a time until you love someone, instead of being in love, but i believe it takes a while to love someone, since you have to accept someone's bad habits and stuff too. It takes a while to find all those out.
And if you can accept them, then that also means you can deal with it,talk about it, make possible changes to make it all better.
If a presumed true love falls apart, then your feeling for the other one might have been true love, but it's probably not mutual.
If it was mutual, then sure it was true. There's a lot of factors in life that can destroy true love.