[roflson]

This may get lost near the bottom, but instead of analysing what or why you are in your situation, here are a couple of concrete suggestions:

1. Go and volunteer with redbrick.org. You can conceivably fill two half days of your weekend doing something good, often with other people who are flying solo.

2. Try rock climbing. Take the intro to climbing class at a local gym (there is one in Sunnyvale and a few in San Francisco). It's extremely social, and you always have something to talk about (rock climbing)

3. Go to a meetup.com group of interest. Try something that you are into, and something you aren't. But it will get you out of the house.

If these kinds of social activities fill you with forboding, that's fine, but people are very open and welcoming and this may give you a building block.

Good luck.