It seems to me that the relationship with the neighbor - is one of the hardest things on the planet. After all, you are constantly interfering with each other. He is not pleased with your music, your daily classes, the smell of your apartment. Yes, and you have a lot pritenzy to it. So you need to start right away, and it is desirable, with a friendly tone.Give him a cake that you baked yourself or make a compliment about his apartment. And most importantly, decorum.