Happiness is finding an oasis after wandering in the desert
What if the other person no longer loves you, or even never liked you? It's just that you didn't happen to become the person they love, that's all. Why force yourself too hard for someone who just passed by? You have no obligation to give too much to the wrong person, losing the best of yourself. The wrong person only brings you some truths, the right person is the one who comes to warm you.