Gah! I'm ashamed to be posting again on your thread, missing, but just in case ....
... For the first three years of my depression I was pretty much housebound, had ridiculous obligations to keep up thanks to my ill-advised divorce settlement, and was fighting my employers who were afraid I'd take action against them. It was hideous. I went, very fast, from being a glamorous, well-paid, "success" to being incapable of holding a small, everyday life together. It was terrifying. Of course I lost most of my friends: those friendships were built on lunches & dinners costing £'00s and all of a sudden I lacked enough money for electricity & food, never mind lovely clothes and jolly expensive japes. On top of which, I didn't thave the energy or enthusiasm for mindless nights out.
I was REALLY depressed. I'm still suicidal (she says cheerfully; that's one of the things therapy can give you!) but, back then, my whole world was dark grey and I saw the worst in everything. Internet forums were my sole lifeline to the 'real world'. Always admitting that most avid forum posters have reasons for interacting by text rather than face-to-face or by voice, they literally saved my life, often, during what I still think of as the "dark years".
My real-life friends did their best to keep up down with me - and were lovely, though I couldn't see it at the time. However, things had changed so much for me that our shared world-view (the one where it's good to spend £300 on a few drinks) was no longer shared. I couldn't afford, financially or emotionally, to keep them going. So I let them slide.
Whether or not you realise it, what you've done is, similarly, let those friendships lside. It's very likely that you have done so for similar reasons - consciously or unconsciously, you've chosen a path of personal development that involves living a smaller life, being more solitary and considering many things in depth. As I've already said, this is what I've done too but I think the BIG difference is that you didn't realise you were making those choices.
Hence, you probably feel like your old life & old self has been "taken away" from you. By whom, or what? Can you think about that?
Folk you haven't seen for 20 years aren't friends, they're people you used to know. I used to know lots of slebs, but I don't feel they've dropped me. Our lives put us together 20 years ago, now they don't. It's the way of life.
I would really like you to think about this, if you don't mind? Perhaps you could post back with your personal view of what's happened with you in the past couple of decades, and how it feels to you?
Thanks :)