How to live with an ex?

So my girlfriend and i have broken up about a week ago and we live together. We are both on the lease for another year and we dont hate each other so we are happy to share the house but its been really hard for me to not see her as a girlfriend we were together for 3 year so its habit. What can i do or try to make things easier for my self to just see her as a friend or any other person
How to live with an ex?
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