Ok, So I have this class soon. I don't know if I have the guts to tell him, because I am scared.

Hopefully I wouldn't be too scared, but I always end up getting to scared, & not doing it.

Should I just ask to talk to him,or say that I need to tell him something?
How much should I tell him? What should I say at first?

About the suicidal thoughts, do I tell him right away,or later on?

Sorry for so many questions, & for saying I tell someone, but then I end up not.