I am so sorry that you are feeling so bad.
The fact is, many of the people you love do not see things the way you do. A lot of that is your insecurity and anxiety and depression talking. We often project and think things are much worse than they really are, because we feel so guilty and sometimes hopeless.

You are doing the best you can at a difficult point in your life. Try not to beat yourself up so much. I'm guessing that your children feel frustrated- not because you are dragging them down, but because they are concerned and don't want you to feel bad.

The best thing you can do for all of you is to take care of yourself as best that you can. ANd let other people care about you.

And, I have to also tell you that my advice is to STAY AWAY FROM FACEBOOK! Really!!