Was I wrong to tell my ex’s parents he relapsed on meth around our child?

My son’s father (30) got out of prison 2 years ago.. his parents and I are very close for the sake of our son and they’ve helped me out a lot while he was in prison. He lives with his parents and works in construction Monday-Friday and we all were under the impression he was clean.. he expressed wanting his family back so we got back together and were doing well for 3 months until i caught him smoking meth in my laundry room while our 3 year old was home… immediately got upset at the fact he would relapses in my home especially around our child.. i made him leave my house.. he begged me not to tell him parents or anyone and how sorry he was etc.. i went 2 days with no contact and he kept blowing my phone up to talk.. he admitted he smokes it and snorts it and when i asked him how long he’s been doing it for he said since he got out of jail.. i got upset he had everyone fooled.. i told him i just couldn't be with him anymore and how i refused to go down with him if he got caught and i decided to let his parents know 4 weeks later. they kicked him out of their house and told him either rehab or he needs to leave and he called me and told me i betrayed him and ruined his life etc.. he said some really hurtful things and i haven't heard from him since.. his parents are still trying to get him to go to rehab but he refuses.. i texted him earlier today letting him know i love him and wants the best for him and all he said was thank you.. why do i feel awful for only trying to do the right thing and protect myself and my son and him considering he can get himself killed? he's staying in a hotel and while i love him i just can't go back

Was I wrong to tell my ex’s parents he relapsed on meth around our child?
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