Hi SFTTsrvnt, welcome!
I commend you for sharing; it's not easy, even on an anonymous forum. Keep it up! I relate to the double life, being a 'phony liar', and shame. Two things were very helpful for me -
1. Realizing that I'm not a bad person, just a sick one, and I'm trying to get better. In the end of the day - Hashem brought me to where I am now, and that includes how I was originally exposed and drawn in to these behaviors, through no fault of my own. For some reason, my loving G-d put me in this situation - and my loving G-d is showing me recovery from it, one day at a time.
2. Sharing my struggles - a. It helps me get them out of my head, which usually helps put them in proportion/shrink them. b. It's a tremendous source of support/validation that someone else undersands and knows what I'm going through, and might be going through the same thing themselves. Additionally, speaking it out can be downright hilarious - especially when someone/everyone else identifies with my insane ideas.
Good luck!