It's hard MissRosie. Rather than not thinking about it, I let myself think about it for a while and do some pointless googling til I get fed up. I find it's worse if I try to stop myself from doing these things. I find writing in a kind of journal helps - just to get out the frustration. Making plans to meet people or go out, if you can, helps. I don't think about it much when I'm with others, other than to remember I can't say anything or better not drink etc.