She came back after marrying for a visa… can I trust her?

We were together for 5 years, on and off since college. When she left for Canada, I thought it was just for work. Then she marries some guy she barely knew—just for the visa, she says. I was heartbroken but I never blocked her. We still talk sometimes, late at night when shes lonely there. Now she says the marriage is fake, they have no life together, and she wants to come back to me. Part of me is happy, but another part keeps asking: if she could do it once, what stops her from doing it again if she needs something? She says it was just paperwork, no feelings, but still… that’s not something you do to someone you love, right? Her family knows and they’re acting like its normal. ‘She secured her future, now she can be happy with you’—like its that easy. I dont even know if shes the same person anymore. I told her already I’m confused and she said ‘you’re my real love, naman.' But how do I know? I miss her, yeah. But I also miss the version of her that was honest.