It's hard to let go of the deep feelings to the loved ones. Maybe even though he already belongs to someone else. It does not matter whether men or women are perfect, provided they are mutually perfecting each other. The easiest way to know if we fit in with the person or not is when we feel forgotten of time.
But because that person is the person we are making that makes it special. If that person is not the him, it probably will not be the same anymore. True love does not just happen, it's a growing process. He develops after you experience up and down, suffering together, crying together, and laughing together.