Hello. I dd often feel like you do when DD was a bit younger. She's 3 now and it's become much easier. I think it's hard when you're on your own with a very young child particularly if you are still missing your ex.
As for what we've done today - not much. We've only had a dusting of snow and I was mean mummy because I wouldn't let DD play outside in it for long. We've "watched" (ie it's been on but not really watched much) Toy Story 3 about five times (groan); done some painting; DD did some "washing up"; played some pretend games and she's now pretending to be a dog. I have to throw things and she fetches them...
To be honest, it sounds as if you need some adult conversation or something to stimulate you more. Do you have friends around who could come over after DS is in bed? Just someone who could make you smile?
I understand if you don't - I live hundreds of miles from all my friends and often feel I can't ask my newer, childless friends to come over as I don't want to intrude in their lives, etc.
i used to feel like this all the time.Horrible. I didnt realise how bad it really was until i started work and could chat to other adults all day, and feel INVOLVED. i took anti-depressants which helped loads but it was entering the work place which changed things overnight for me.