They have their own needs? And it's not always fair, but if you think back upon you life, have you ever left even a friend? Most can't say they never have. I'm loyal to the hilts, but I have left friends. You just learn to grow and hopefully if you don't hold resentment, and they don't either, maybe one day you find yourself connected again? And if not, then it is a step along your way of what in this is called a journey and you just learn to love in your own way.