Although I am clean just three weeks, I feel like this whole tumah thing is a million miles away. Like it was just a bad dream. I try to imagine it and I think to myself, "what, I did such things?". So I guess I am ripe for the Yetzer Hara to catch me off guard . Please advise.
It never ceases to amaze me how my entire perspective - my entire reality - can change drastically, should I lust. There is no regard for how long I may have been sober, nor for how "sober I feel"... It can all change in a shocking way.
"Slip" stands for Sobriety Loses It's Priority. The priority doesn't change just because I seem to be better.
It sounds like you do not want to be a korban on the mizbayach of "the recovered". I say, "Good for you!" I have seen enough well-meaning guys lose it all after getting smug, and I wish to have no part in it.
Practically speaking, this little guy advises: Consider working the steps with a sponsor, if that is the derech you choose. If not, then at least adhere to whatever derech you want, but for G-d's sake, do something, and do it all the way. And keep it "one-day-at-a-time.