There is nothing from what you wrote that would indicate that you should have to do anything about your penis size. A 10-inch erect penis is somewhat above average, but there is no reason you should want to change your body. It is a shame that your friends would make you feel uncomfortable about yourself. Maybe you could let them know the name-calling bothers you and ask them to quit it. If they truly are your friends they will stop teasing you. As for the awkwardness you experience when walking, you could wear a jack strap that would help a lot. There are medical procedures that can make the penis appear to be smaller, but in fact some men later complain of impotency.