This quote reflects the unfortunate reality that sometimes, people only come to realize the value of someone or something once they no longer have it. It suggests that some individuals may not fully recognize or appreciate the worth of another person's presence, efforts, or contributions until they experience the absence of that person in their lives.
The phrase "learn how to appreciate you by losing you" implies that the act of losing someone can serve as a wake-up call, prompting those who took that person for granted to recognize what they had. It speaks to the idea that absence can create a void that highlights the significance of the person who is no longer there.
In a broader sense, the quote also underscores the importance of recognizing and valuing the people and things that are meaningful to us while they are still a part of our lives. It encourages us to be mindful of the relationships and opportunities we have and to express gratitude and appreciation for them, rather than waiting until they are gone to realize their importance.