Well I'm one of those who suggested branching out to other clubs.
I say that not because I think you might want to take up a new hobby but because it will open the doors to a new pool of people you haven't yet met.
It's not meant to be patronising, it's meant as one human to another to try and buck you up cos you sound utterly fed up and I was frankly quite worried. And I'm sure you have done all those things, and every response you've given is that you've tried absolutely everything so are clearly destined to be alone. And I know you're fed up, insist you aren't depressed though, so not sure what else you expected or hoped for really.
So I'll respond how you appear to want, though I don't believe it. Yes, this is it for you. At 36 your whole life is mapped out on the basis of how the last few years have been, and will never change. So suck it up.
Its not what I believe, and I could have passed by and said nothing. But i was concerned at just how low you sounded.
Bottom line is, if you want something you've never had, you have to do something you've never done.
In the meantime I'll go back to the thread about the lady who has left her abusive partner today after many years and cheer her on, cos she wanted something and did something new.
Genuinely, I mean this well meaningly. Go to your GP. I appreciate it is hard to get a feel of someone online but some of the things you have said, phrases you've used, your sense that there is mo point in trying anything, with a negative response to everything, all indicators of depression.