Your initial question, "Is Reincarnation a Requirement?" was answered by the Buddha 2,500 years ago. Buddhism sprang from the belief system of early India where reincarnation was widely accepted. It was believed that every soul has been reincarnated an infinite number of times since beginningless time. There was believed to be no end, no escape, and the cycle of suffering was to continue forever.

The Buddha posited that it was possible to break the cycle through purifying your mind of delusions. In fact, the entry into the Buddhist path of practice is to change your orientation from concerns with this life and your worldly circumstances to focusing how you can create better Karma for future lives, ultimately leading to Enlightenment when you are released from the endless cycle of birth, aging, sickness, and death. The entire Buddhist tradition is about purfying your mind (and thereby your Karma) to stop reincarnation from recurring. Once released, you exist in a Pure Land, a state of mind of eternal bliss.

The longing you feel to stop coming back through reincarnation is the feeling Buddhists call Renunciation. It's the emotional drive that motivates all Buddhists to practice. Whether you were looking for it or not, you've discovered the gateway to Buddhist practice.