Why?

Is it possible to love two people at a time? I'm with someone right now, and I've never loved this passionately before. But when I think about you, I don't remember the way you hurt me, the way you replaced me, I remember the old you. And it hurts. Why does it hurt? Sometimes, I wish I just fell out of love first. I'm so much better of now but.. Why do I feel like a different person when I think about you.