Thinking negatively. Good way to do it?

I always go into things thinking positive...only to be let I am trying this new thing where I go into it thinking that I am not hurt as much when it does not go my way..

My crush is gonna be working with me tomorrow (co-workers) and she is always wearing a dress...tomorrow will involve some bending..and I know how girls do not like to bend in dresses ;) I know she will most likely not wind up wearing one because well girls DO NOT dress FOR men...but I like when she does it... question can I go into tomorrow thinking that she will not wear one (even if she winds up doing it)?...I just want to not be let down as much..if she winds up not to..
Thinking negatively. Good way to do it?
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