It's more fun to travel alone! I lived in Berlin and Budapest, and traveled through Europe alone also..and in the future, I will do the same in South America :)
But you don't stay alone for very long..you meet new people and they become your friends. And this allows you to experience many new things, and meet lots of different people. If you travel with people, then you don't grow as much. This is my view at least!
And yes, I want just friends. I am not looking for a girlfriend :P
Good luck on your exam!!