{{{{{{{{{{{Candy}}}}}}}}}}} What can I say, being in the same place as you are right now. Yup! Depression is a master LIAR. It whispers it's ugly comments in the hidden recesses of your mind and warps your outlook on everything else.
Keep a watch on that self-talk, Hun. For everything negative Depression whispers to you, yell back TWO positives! "I did what was best for my boy, therefore I'm a great mom!" "Wow, look at all the experience I'm tucking under my belt so that I'll be able to get one of those high-paying jobs soon." Etc., etc., and soforth.

You said it yourself! You're intelligent and witty!
Oh... and get your sweet self under that lamp, will ya?? LOL
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Psalm 119:105 Thy word is a lamp unto my feet, and a light unto my path.