Hi Cinossaur,
I told some of my friends about my depression. In general I did it within a broader framework (for example, a chat about our lives lately to catch up, etc)
I was direct and frank saying that I have a severe depression.
In my case, only those who had been depressed or under other mental health condition could understand me and be supportive.
The others reacted in ways that were not useful for me, and in some cases I had to take some distance from them.
But this does not have to happen to you necessarily. It is just my experience.
Hope this is useful somehow.
I send you a hug