missing the people in my life

even though people are in my life there are moments that i feel they really aren't and i miss them so much. people go their own ways...they are busy and so am i. and i wish that things could just be back to normal, that i could rewind time and live it all over again.
life goes by so quickly and i wonder if i am missing out on something...or someone. people come and go so quickly i wonder if that's how the rest of my life is going to be -- will it just be a flashing of people in and out of my life and that's it? is it just going to be people in and out of my life...and me feeling as if i were standing still.