new partner is vanilla, do i mention the 8 years of LS or just... not

divorced 2 yrs, dating again, met someone amazing. she's 41 lovely funny smart works in finance very vanilla as far as i can tell. we've been seeing each other 4 months and it's getting serious. the thing is i was in the LS with my ex wife for 8 yrs. it's a huge chunk of my adult life. most of my closest friends are still LS people. i'm not currently active and i'm honestly happy being mono with her if that's what we're building. but do i tell her about that whole chapter? feels dishonest to hide 8 yrs of my life but also feels like setting off a bomb in a perfectly good thing. when do you bring it up... how... or do you just let it stay buried