A little late reply maybe, seeing the posts' dates. I was googling after problems with focusing, cognition and attention, then I came here and thought yeah, it's called depersonalisation. It's really about over-analyzing yeah, I've had and still have moments where I have to actually realise for example "This is my father". I've come across it before. I've researched into it a lot, lately I've especially been interested in thinking and reading about introversion. The depersonalisation isn't as bas with me as i'm getting stronger, though my work at the PC doesn't do it that good, I feel better after a day of being busy moving house or working in my new appartment. During my studies, when programming, I used to leave for a few days to help my parents at their farm. Once my doctor only said that when you have problems concentrating it is often a case of needing to exercise more. This afternoon I planned to do that (I have done it regularly enough) but I came across a column which said that music might be better for a person than sports, I liked it and played a while on my keyboard and as I had noticed before it really lifted me up (fulfilled me).
The way I handle it is accepting it and just go on, really not over-analyze all the time. By the way I often have the idea that I'm doing this on purpose, wouldn't know... I also think that only when you doubt things can you be really sure of them (as opposed to just assuming them). As you see, I'm not really focused with this thing itself, I keep thinking and wondering, not all the time... I've really made progress to not collapse over things I might have done wrong, and instead thinking happily about an experience. Also, adressing it only helps already. Another way I've worked is to really join in the conversation, with my family for example, and to finally move again at a concert I went to recently.
I hope this is a bit clear...