It's true you really do get sick of yourself. I found it somewhat helpful to put a breast cancer talk ban on at any social gathering and that included myself. Everyone could ask me how I was at the start of the night and then that was it. i'd grab my glass of wine and we would talk about anything but that. Everybody just treated me the same, there was no need not to. I agree with the future planning thing @Sister. I had that for a little bit. But it does pass once you start to feel a bit more human again.
xoxoxoxo