This summer will mark five years since Glee star Naya Rivera’s shocking drowning death. The former Glee star's ex Ryan Dorsey opens up to PEOPLE exclusively for the first time about Naya's passing and life as a single dad raising their son Josey. Dorsey can't help but think that if he'd been there the day Naya died, he could've done something to change the outcome of the day. "I probably would have jumped in, and I like to think I would've saved the day," he says. "But on the other hand, I think maybe something bad could have happened to both of us. I don't know."