I got one can tell you your kids DO need you and would NOT be better off without you. That’s depression lying to you.
Do you have anyone in real life you can talk to? Like a therapist or a pdoc? I think it’s time to contact your psych team if you haven’t already.
Just know that depression lies. It says that you’re worthless and useless when you are not. Bipolar cycles, it’s the only reliable thing it does, and you will not feel like this forever. Try to hold on to that.