I bought the wolfquest game 2.7 around 2015, and I asked wolfquest admins if I had bought it under my old email (this one) directly from their site; they said no. They suggested that I may have bought it from itch but when I checked my library nothing was there. Can your game disapear or become inactive if you havent played it in 3+ years

I doubt it. Maybe you bought it before having an Itch account, and forgot to claim it after getting one?

No no, I know I had an itch account when I purchased it because I made one just so I know ill have wolfquest on here. I wouldnt have even made an account for itch if I wasnt going to buy a game.