Pro tip: delete the app on your phone. Needing to put in the website into the browser breaks the misscle memory and you can then easier replace it with something else.
I'm surviving without it ... People just text me... never had one by choice so don't know about addiction but as with everything is best to just quit it definitely... Make a post saying you deleting your account and change the password to some random characters .... The social pressure of failing even to quit Instagram in front of everyone you know will definitely prevent any slip ...