Don't hide it! I tried to keep my depression secret, but it was pointless. My team leader in work noticed that I had become withdrawn, so I told her in a very emotional supervision that I was suffering. Then everyone in work was incredibly supportive. I immediately created a support network for myself. Earlier in the year, I told my friends, and again they were, and still are, an immense support network. Hiding it makes things worse. People understand mental health better than ever, so tell people and they'll understand