I'm sorry to hear that you're having to experience your mood dropping unexpectedly. That happens to me too sometimes. One minute everything is fine and honky-dory then seemingly out of nowhere everything loses its color. I go through the same process of awareness as you sometimes too. It's absolutely unpleasant. I get frustrated with the loneliness too. Frustrated because there are a couple of people that I know IRL but I don't want to continuously talk with them or initiate conversations because I don't want to be needy.

Do you have anything of which you can distract yourself?