I already love in you your beauty, but I am only beginning to love in you that which is eternal and ever precious – your heart, your soul. Beauty one could get to know and fall in love with in one hour and cease to love it as speedily; but the soul one must learn to know. Believe me, nothing on earth is given without labour, even love, the most beautiful and natural of feelings. <...> But the more difficult the labour and hardship, the higher the reward.
Count Leo Tolstoi to Valeria Arseneva, his fiance. November 2, 1856
"You are beautiful, but you are empty," he went on."One could not die for you. To be sure, an ordinary passerby would think that my rose looked just like you — the rose that belongs to me. But in herself alone she is more important than all the hundreds of you other roses: because it is she that I have watered; because it is she that I have put under the glass globe; because it is she that I have sheltered behind the screen; because it is for her that I have killed the caterpillars (except the two or three that we saved to become butterflies); because it is she that I have listened to, when she grumbled, or boasted, or ever sometimes when she said nothing.
Because she is my rose."
You may not be her first, her last, or her only. She loved before she may love again. But if she loves you now, what else matters? She's not perfect — you aren't either, and the two of you may never be perfect together but if she can make you laugh, cause you to think twice, and admit to being human and making mistakes, hold onto her and give her the most you can. She may not be thinking about you every second of the day, but she will give you a part of her that she knows you can break — her heart. So don't hurt her, don't change her, don't analyze and don't expect more than she can give. Smile when she makes you happy, let her know when she makes you mad, and miss her when she's not there.