Everyone keeps telling me that I should know my boundaries. I was curious to know what are these boundaries? How do I set clear boundaries in my life especially early in recovery where I'm in a gray area?

In the past few years I was living in almost a passive state of mind.As my using increased I crossed many boundaries. I got so used to this passive state that I forgot wht it means to say NO sometimes.I was a "too good friend" as Stagebear said and the best this and that ......meanwhile I forgot where I stand in all this equation.I tolerated many painful situation where drugs were included .I thought that was normal.Now I know it's Not.It's like waking up the morning after a destructive storm. I don't know where should I start fixing my collapsed life. I say collapsed because I find the wreckage of my past catching up with me. I was never like that before. Addiction degrades us into people we barely recognize. I became so arrogant and reckless. I had to do my way at all costs. I forgot what's like to love people (especially my normal friends) without asking them for anything in return or finding them too boring. I find myself still too numb to react to anyone's suffering or pain. I feel as if I'm too exhausted to care anymore.

Do you think the old me is till alive somewhere or do I have to build a new character? (Fake it till you make it). I am saying that because I cannot recall any single event from my using period or even before. It's either because I was too loaded or unconsciously my mind is blocking my memory as they're a constant reminder of a past I don't wish to recall. However,in the process I blocked the good memories too. People keep telling me "remember what this girl said & how you. or how we enjoyed this concert....".I just cannot remember. That's freaking me out.It's scary.I'm filling new blank pages with no single recollection of the past. So are the boundaries, the ones my AA homegroup constantly keep mentioning, step one in relation to people places and situations? Or are there some other boundaries that should be set early in recovery. I'm going to share this subject in a meeting tonight but I'd like to hear your feedback also. Thanks.