Together
Disclaimer: I don't own HP, J.K.Rowling does!
We are in this together. This fight against Voldemort. He actually happened to create his own enemy, and sadly enough, even though he marked Harry, he will have to learn that this will be his own doing. Even though Harry always asked us (Ron and I) to back out, we always tell him we are in this together. Together we shall fight, and win. Even when we are separated by the war, I believe that Harry will win, and save the Wizarding World. Even if he didn't ask for this, even of Harry never wanted this to happen. Our friendship was destined to happen, and after all we are in this together, and no one will stop us.