I'm seriously burned out "CTO" (small company 20 people, 4 developers).
Should I tell my CEO/CFO exactly that?
Should I tell them, I can't take it anymore, please help me.

Next month we'll have a fund raising opportunity.
I'm afraid it will sound like a blackmail.
I'm afraid they will think, ok, he's burned out, let find somebody else.

On the other side, if I take the risk myself, without telling anyone, I could explode and I'll be on my own.

What do you think it's the best approach?