I'm not going to tell you what you "should" do. But I will share my experience.
A few months ago, a member of this forum had a similar situation. Her beloved tame male budgie had died, and she felt she couldn't give enough attention to the surviving hen, who was untame. (Plus she was grieving the death of the male.) She re-homed the hen to me. After a two month adjustment period, the hen is now a happy member of my flock of 13.