Who gives a damn?

Is it possible to go through life without any real friends? I'm not talking about the phoney Internet kind --the instant 'friends' of Twitter, etc.--but the kind who love you no matter who you are or what you look like? I believe I have gone 68 years without a real friend, without someone who would really care if I suddenly weren't around. But then...maybe I have never been a friend to anyone. I was married for 34 years, but never really knew whether my spouse loved me or whether I was just a convenience. But, again...what is 'love'?