I'm in a similar boat right now, I hope you find a path. Try at least one thing mentioned here out of your comfort zone, it can only help you
Sometimes people in the web can fill your emptyness of friends. I found a real best friend in Jesus. You could try with him. I could talk to you about him any time you need!
I saw an old friend who lives in another town today, and when I left I felt worse. I felt depressed. I think it’s because I know time has moved on, and the old days are long gone. I just know I’m mentally drained and actually feel more alone.