It is often said that true love exists and never dies and that equally if you truly love someone then you are destined to be together.
These are, of course, very different points as there are a multitude of different kinds of “love”, some equally “true” but none with any guarantee of a shared destiny or even a shared journey en route to different destinies.
It is certainly true that if you love someone deeply enough then you’ll never stop loving them, no matter what happens; but that in no way ensures that they’ll return your love or want to spend the rest of their life with you. Even if they do, it’s not a guarantee that there will be a “happily ever after” in the storybook sense.
Love is by nature a purely emotional connection and has little grounding in realism or practicality. Love at first sight is further problematic in that it is simply lust or at best a deep attraction and has little to do with “true” love or emotional connections, and again little or nothing to do with reality and practicality.
Relationships are the key to “true” love and the fictional fairytale ending; however they require work, something that our concept of love, thanks in part to books and movies, does not take into consideration.
This has been the downfall of many relationships due to there being very little basis in friendship, truth, shared interests, and other such aspects that are so often forgotten in the heat of the moment in a new relationship.
Of course even with the best of friends and the deepest of connections there is no guarantee of a happy ending, but if you can form a deep bond with someone, providing for each other’s  physical, emotional, and intellectual needs then that, I believe, is about as “true” a love as anyone can ask for.