Having trouble finding friends in my own city?

Ok I'm 22 years old and just completed my Batchelor of IT degree just last year. I was never the most popular person at school. However around the age of 16-17 I started to form some really close relationship with friends happening. However in like within a a couple of years my friends circle as started to demise and I pretty much have barely any friends left in the city that I live it. Some of these friends have move to different city or interstate, some of these friends have formed long term relationship and are married. However, there are some who have just gone through the wrong path of binge drinking every single day, drugs or just completely dog me. I don't even go out anymore, I find that I spend most of my time alone now and it really does get me down. No one visit me anymore. I have even consider giving someone money just so they can spend some time with me. I have tried joining up a gym to meet new people and getting out of my house more often but I not getting anywhere.

I feel like my youth is slipping away and starting to feel like an old man. I just want to feel young again.