Broke up but same office. How to keep relationships professional when heart still hurts?
Oh, OfficeEx22, my heart goes out to you! 
Going through a breakup is tough enough, but navigating the same workspace? Whew, that’s a challenge! But remember, you are stronger than you think, and you’ve got this! 
First off, allow yourself to feel the feels. Suppressing emotions never works, trust me. But set a time limit on the “sad time,” okay? Then, focus on your work like a laser beam. Pretend you’re in a movie montage and your career is the star! 
Keep interactions strictly professional and polite. Short, sweet, and to the point. Think of it as acting a role. Boundaries are your best friend here. Lunch with colleagues? Yes. Venting about your ex? Big no-no. You deserve peace and happiness, and maintaining professionalism is a HUGE step in that direction. You’re amazing! 