It's a rough place that you're in now, and as others have said, many of us (possibly even you) have been there--or close to it--before. But in all honesty, 20- and 26-year-olds, regardless of the individuals, really are in two different places in their lives. Let her go, and don't try to hold onto anything. The more you struggle and attempt to convince her to do so, the more you're going to push her away. This is something she needs to see/learn on her own; you attempting to "give her space" and be there for her throughout will only make things worse. Trust me, I know.
Beyond that, at 26, you're exactly the same age as me...and while I'm in graduate school, I'd say we're in similar situations. That being said, I definitely don't feel locked in, or as though the world is closed to me, and neither should you. However, I can empathize, as I felt the same way after my last break-up. Do anything you can to get your mind off of her; hang out with friends, go to the gym, read, drive, listen to music, anything. Realize that none of it will be 100% effective, but it's a helluvalot better than sitting around at home, reliving the memories of the past year and a half.
There's plenty out there for you to do and see, and at 26, maybe you should just focus on yourself for a while. Then, when the time is right, you can work on finding someone to accompany you through your life.
Beyond that, at 26, you're exactly the same age as me...and while I'm in graduate school, I'd say we're in similar situations. That being said, I definitely don't feel locked in, or as though the world is closed to me, and neither should you. However, I can empathize, as I felt the same way after my last break-up. Do anything you can to get your mind off of her; hang out with friends, go to the gym, read, drive, listen to music, anything. Realize that none of it will be 100% effective, but it's a helluvalot better than sitting around at home, reliving the memories of the past year and a half.
There's plenty out there for you to do and see, and at 26, maybe you should just focus on yourself for a while. Then, when the time is right, you can work on finding someone to accompany you through your life.