Dream Invasion

My dreamworld has been intruded not once, but twice by a man that I used to have feelings for. I wake up wondering why this is, do I subconsciously still want him? I don't think so. So why does he haunt my dreams? In both dreams he was off in the background, sort of making his presence known, but never having interaction with me outside of stealing glances from a distance.  We are always in public places an I'm always surrounded by people and he is by himself just watching me and for some reason I can't get to him nor does he attempt to come to me.  I really don't know what to make of this, but I really wish he would find an exit and use it.