If you had a broken leg you would take time off work and be in bed. Right now your heart is broken.
So often with the health of our mind we try to function as usual and maintain life but if you think about it in the context above that’s impossible!
There’s only one thing that will heal a broken heart and that’s time.
If I was you I’d grab the cat, put movies on, lie on the sofa and cry for a week. Just accept that this is going to hurt because you are broken. Give yourself sympathy, hot bubble baths, time off and love.
Maybe in time she won’t matter as much. If she actually broke your leg you’d probably not want her back. She broke your heart and that’s ok?!