"Someday everything will make perfect sense. So for now, laugh at the confusion, smile through the tears, and keep reminding yourself that everything happens for a reason." Even if someday it doesn't make perfect sense, it happened for a reason.
Sometimes we put too much time and energy into people who do not appreciate or reciprocate. Some people push and push until we have to give in and acknowledge we can love that person but we cannot continue to revolve our world Round him/her.