I've been in the same apartment and job for 1 year now, and it feels amazing. In a time when a lot of my friends are exploring the world, getting married, and having kids, I'm not. The best part is that there is nothing, or no one, that is dictating how long I stay here. I could and can leave whenever I want. I know I don't have control over everything in my life, but I do have control over my job, and that is an amazing feeling.
For some context, my last job as an engineer, I had signed a contract saying if I left before 1 year of work, I'd owe back the moving expenses the company paid to move me. This TRAPPED me to that job. When I say I have "control" over my job, I don't mean complete control. I don't control if I get fired. BUT, I am in a great position to move on if I do. (Don't worry, I don't sense that I'm in trouble of being fired or anything).
I like the stability of where I am at right now. I haven't had any consistency of living or work for a long time now, and it's super nice.
Don't get beat down by seeing friends getting married, popping out kids, or going on trips around the world. If you're not doing those things, you're tackling problems now that you won't have to in the future. We're getting just as much life experience by learning to deal with problems now that all of those other people will face in the future.