Allison Mack told her fellow "Smallville" alum Michael Rosenbaum she thought about ending it all during NXIVM's downfall ... but hope -- and just plain old curiosity -- saved her. As you know ... Allison was a high-ranking member of the sex cult NXIVM who recruited new members to join. Many of these recruits ended up being abused by the group's leader, Keith Raniere , who is serving a 120-year prison sentence after his 2018 arrest in Mexico. In an interview on "Inside of You with Michael