There's no reason why countries with a history of bitter and brutal conflicts can't coexist peacefully. Europe of course is the best example. The primary motivator for such a phenomenon is mutual interest in economic development and the desire to raise the standard of living.
Most of India's population is under 25 and the partition does not affect them in any way, its only a retroactive emotional issue. Question is how long will the society burden itself with something that has already happened?
From a practical point of view the biggest impediment isn't the partition from over six decades ago, it is the fact that Pakistan is extremely unstable and is a long way off from taking up the common cause of economic prosperity and improving the standard of living.