Friends come and go. You intersect on your paths. If you are to remain yourself, you cannot stay together forever. Doing so would cause you to become more alike, meeting on the middle path, somewhere between the two paths you would each otherwise walk on your own. There is a rare friendship where you can walk side-by-side. Some paths run parallel just by chance. Some will deviate from each other and then cross again at some point in the future. Some will deviate and never cross again.