Questions...

I sometimes wonder why it is that I have such a hard time letting the past be the past. Why do I always look back? Why can't someone just leave my life and that be the end of it? Why do I always need closure? Why do these people that leave my life find it necessary to then pop in and out of it? Why do I hold on to feelings for far too long? Why do I care? Why am I so easy to let go? Why is it that when we first start out (friendship or relationship), me and that person are attached at the hip (per their doing, not mine), and then suddenly we're so far apart? What is it about me that pulls people in and then repels them?