Does anyone experience this and/or have any tips for dealing with it?

It doesn't matter if I have a terrible night or a great night, I always seem to end up feeling depressed the next day.

I don't really have any proper friends anymore, all my old wings are married and I can't find new wings because the PUA scene seems to have died in my city. I'm left gaming solo and talking to women on nights out is the only social interaction I get outside of work.

I'm conent with how my life is, I don't normally feel lonely or anything, but for some reason without fail, going out at night will always bring out a feeling of loneliness the next day. It makes me text the girl I hooked up with the previous night and almost try to pursue her for something more than just a hookup, but those feelings normally wear off once the depression wears off a day or so later when I'm back at work.