I think it's all a sign that you look for happiness at a wrong place (for you). I'd suggest to look at other aspects of life, in light of what makes people happy, what makes their time feel worthwhile. For example, you haven't listed your social connections at all, aside from being single. If this reflects your current priorities, I'd suggest to look for people who make you feel like you belong.

Coincidentally this is also how I personally moved my life forward, but it's not just an anecdote, lots of different sources tell me that this is what matter at the end of the day. For a random example, Season 3, Episode 4 of Bojack Horseman (Fish out of water).