For two people in friendship there is no need for words or gestures, you often understand your friend and his/her unspoken statement. Brains of two friends are interlinked so much so that friends can exactly think at the same level as his/her friend. Can call friends as "Two bodies same soul". You often tend to know what's going on in your friend's mind.
True friendship consists of putting yourself in your friend's place. Know that your friend is as emotional as you. The thinking level of two friends lies at the same level as if in the same brain! You can know when your friend is thinking of you and your friend knows that you are thinking of him.
The difference in love and friendship is that in love, lovers miss each other when they think of each other. Friends never miss each other when they think of each other. Please do not misunderstand my statement. I do not say that friends do not miss each other, because I, myself, have given 'Miss you' cards to my friend. What I wan to say is that when two friends think of each other it so happens that the other calls up the one who is thinking of his/her friend.
I, personally feel that friendship, in all ways, is more powerful than love!
If ever you think of your friend and she/he calls up, do not mistake it as coincidence. It is the power (magnetism) of friendship!