Purple,

Make a cake/ buy a cake .. have a lil get together, a celebration for him for moving out. Of course its not a real happy thing for you, but for him it is.. Us parents always put on a happy face for our kids.

Keep going to the gym. Make plans with your friends, keep busy. Mentally you can no longer fall back on " my son is here, if not I'd never see a person" It's not true.. You can and do see people, make the effort, force yourself. Sometimes even us Bipolar people need to force ourselves past our comfort zone.

You can do this. I am certain you can do this.. You deserve a happy life and you can have it.

Just have faith in yourself.