Pat wanted to get closer to Pran, just by himself without pulling in any external factors. He wanted Pran to like him for who he is and befriend him again. He tried his best to not hurt Pran in all the engineering vs architecture brawls, he helped Pran to secure money to build the bus stop, he volunteered to move out (also because he felt guilty). But even then Pran kept trying to keep his distance. And then Pran got pissed that even after all the hassle, the company could only invest half the amount and he still needed to find more. He realised that no matter what he or Pat did, they were never gonna have a smooth or easy friendship. So he kept his distance. And that was when Pat realised that he had to pull out the big guns. That’s when he decided to give Pran his guitar back. Because he knew how much the guitar meant to him, and he knew that Pran would soften the moment he gets that. But he wanted Pran to like him for who he was first. He still one more trick up his sleeve to settle the bus stop issue, but that was when he decided that he’ll give back the guitar. And so the moment he could convince his eng gang to help out with the bus stop. When that hurdle was solved, and Pat knew that Pran was more calm again, that’s when gave the guitar.