Life is passing me by and I can't do a thing about it.

I'm now 24 years old. My old school friends are mostly in relationships, travelling the world. Some are married, others are working in south America, one is in the middle east making a 6 figure salary working for an American consulting firm, another just bought his first house. Over the last 6 years I've watched myself fall behind inch by inch. When all my old friends got their licenses to drive, I didn't. When they went through the university experience and graduated I didn't. When they got their first corporate jobs I didn't. While they moved around the country and even around the world I still live in my childhood bedroom. I've read a lot of stoic philosophy in my time and it resonates deeply within me but I'm really having a hard time processing the fact that all of my old friends and it seems the whole world has moved on while I'm stuck behind, still doing the same things, walking the same streets, going to the same places as I was when I was a kid. Any of you guys who are in a similar position. How do you square the fact that you're one of the ones left behind like me.??