Unsolvable life situation?

My current situation: my coping resources have been overwhelmed for years, in terms of, I have not been able to get back to normal functioning. I can choose either between facing endless incredible pain (at best emptiness until the pain comes) or between distraction. Neither state is functional.

Why: I don't have my friends anymore. I spent years on trying to spend more time with them, it all ended in a disaster. The last remaining friend (who I'd have liked to call my best friend) has not had time for me since last summer except once and then I could see all she wanted was go home. (She's a bit depressed too, though, but I'm not sure if it got worse for her or why this behaviour.) Kind of ready to have it ending with her in disaster too. Female friends are just too complex with negative personal judgments etc. And forget about a good relationship (romantically), that stuff ended in a disaster too. I'm unable to feel connected in such a context anyway and this has been this way for a very long time.

The (not working) suggestions I get: find some hobbies, or whatever, idk, stuff like that. No hobby is going to fix this. Therapy also doesn't work. I'm alexithymic and the typical therapy techniques asking me to talk about my feelings or asking me what I think about personal situations don't work. I spent 3 years trying various psychologists. The last one specializes in interpersonal therapy, the last time I was there it just ended with very painful crying about my last remaining friend (a couple weeks ago).

Question: Are there some general (yet specific enough) guidelines/action plan or anything else for such a situation? Or should I just resign myself to suicide (or to completely vegetating at best)?