Should I have known about this BEFORE joining the military?

Ok, so I am an honorably discharged Marine who has been so for about half a decade now. With that said, I am using the (watered down compared to the WWII era) GI Bill in order to PARTIALLY fund my college education. So, I do extremely well in terms of my studies and academics. However, I must say that being an "old man" in a university atmosphere is socially isolating to the 10th power so to speak. With that said, should I have had and/or possessed the foresight to have ALREADY known that my post military college life was going to be socially isolating since I sold my soul to the Marine Corps? I realize that I have NO ONE except myself to blame for being a dumba** and enlisting in the Marine Corps DIRECTLY after high school instead of doing the smart thing and going to college directly after high school and THEN going into the Marine Corps like I should have done. Also, do you guys think that my recruiter should have been upfront with me and told me that this is what was going to happen once I left the service and went to college? I realize that it is too late for me now, but I honestly feel that I made the biggest mistake of my life by not going to college before joining the military. All of the officers that I knew in the Corps met their wives at college when they were young. My plans for finding a spouse, starting a family, etc are all down the toilet now because I am considered "old" now by college aged women since I am almost a decade older than they are. That's why I consider my decision to be such a mistake is because it has now made one of my main goals in life unobtainable at this age. So, am I being a realist about this or am I looking at my situation from the wrong/f***** up perspective?