As Demi Lovato returns to public life, she is opening up about her private life.Speaking to Jameela Jamil on her I-Weigh podcast, released Friday, the Tell Me You Love Me singer, 27, explained why she cut off relationships with old flings and friends.The former Disney Channel star said 'Learning to set boundaries with other people, that was something that I have just learned over the past year and a half.' Cutting out toxic:Speaking to Jameela Jamil on her I-Weigh podcast, released Friday,Demi Lovato explained why she cut off relationships with old flings and friendsDemi completed a 90-day rehab program back in October 2018 after a drug overdose earlier in the year.Since, she explained that it was helpful for her to set boundaries and cut.