I just had one of those. I just talked to someone I haven't talked to in over a month and a half, and I realized just how important that person is to me. I hadn't realized that I felt so different without him, but speaking to him again really reminded me that my life's definition of normal involves talking to him on a regular basis. Thinking about it... I don't like the way life without him looks. To put it simply, I do not know what I'd do without him. I'm glad he's back :)