Usually a true friend is someone who's honest about everything. People who are honest, as well as respectful, generally are good friends. I think a true friend doesn't need to be around you all the time. Such a thing is imposible anyway since everyone has their own life to take care of. However, a true friend is someone who, like us, has their own dreams and beliefs but also respects our dreams beliefs. They have their own family but spend some time with us, and it must be a real relationship not something based in any unilateral interest. Finally, a real friendship doesn't need any sacrifice; it's simply easy. I mean, we must help our friends of course, but a true friend would never disrupt our plans.