to forget?

I just wrote an e-mail to an ex-boyfriend of mine and the e-mail was returned to me...david is no longer accessable via that particular e-mail address. I don't really know why I was writing in the first place. I guess just because I was thinking about him and hoping that he was doing well. I know he's not really the type to keep in touch and would probably much prefer that I not contact him, but I thought I'd be selfish and do it anyway. When I got the delivery failure notice I was a little weirded out, I guess I still am. I've never been very good at letting go or forgetting. I don't mind losing touch with people, but every once in a while I like that people remember each other and send a little energy to a person they haven't seen in years. So to know that this opportunity was rendered impossible is a strange experience. How can you just have a person slip from your life forever. Is that what you do now? I guess so. But I think it will take a lot of getting used to.