Aw, thank you!
It may make sense to ask the mods to move this to the New to Poly section, since you're actively after advice, not just saying hi. People tend to read and post more there.
What is his explanation for why he lied, and why he seems to be passively letting you know now? Is there any remorse for the deception?
(and in fact has been trying to fantasize about it to practice)" <-- This made me lol... it's good that he's trying, and this may well be an effective method, but talk about being libido-driven. Things can be ok even if they don't turn you on!
Me, 30ish bi female, been doing solo poly for roughly 5 years. Gia, Clay, and Pike, my partners. Davis, ex/friend/"it's complicated." Eric, Gia's husband. Bee, Gia and Eric's toddler.