The phrase "missing someone is a part of loving them" implies that the feeling of longing or missing someone is a natural and integral aspect of a loving relationship. It suggests that the emotions experienced during separation can amplify the depth of one's affection.
The second part of the statement, "If you're never apart, you'll never really know how strong your love is," highlights the idea that distance and time apart can test and reveal the true strength of a relationship. It implies that challenges and moments of separation can lead to a deeper understanding of one's feelings.
In essence, this statement beautifully captures the concept that absence can make the heart grow fonder. It suggests that missing someone can be a powerful reminder of the depth of one's love and can strengthen the bond between individuals. It emphasizes that love can be truly appreciated when one understands its significance in the absence of the loved one.