Locking him/her in the basement ! =p ... why not?!? =D Okok, then each advice up here is great !! And, as for me, I like to treasure moments, not people. People are free to stay or go whenever they want to...but I will always have the minutes, hours, years or centuries that we've spent 'together' . So I focus in live the instant with joy and without any feelings of losing anything... :) and that allows me to percieve my friend's presence here and now, which makes me more happy, cheerful and bright... and then we are back to the moment I will treasure... a happy one, whether this person is with me or gone. Ok, it's a little complicated 'circle' but that's how it works for me ^^

Make your friends feel loved and wanted and show that you do care about them.

Here is an excellent quote I found about this topic: "A friend is one who knows you and loves you just the same." Elbert Hubbard

True friendship is to accept the friend, as he is, sharing with him / her, good and bad times with all the sincerity and affection. Keep a good friend is the greatest treasure in the world.

to be a good friend~~we should open our mind~~though sometime we cant share anything to them~but when we share/talk with them,we should tell the true. and when i stay with my friends, i prefer to regard them as my family members,no lie,no cheat,no evil things,no mock(dont be mean).when she/he get success,there is just congratulation without jealousness but overall,just let the things go ,everything should be natu``ral~ if she/he not fit you,dont try to change yourself and compel others to change themselves