Just be yourself.
I had a smilar experience in college, although I was not in the service. I did not have things in common with my classmates and on the whole found them to be immature and could not relate to them. that wasn't their fault, I was just at a difference place in my life, although I was the same age.
But..... not everyone is like that. There are other people, like yourself, who have had different, more profound life experiences and they will be easily spotted by you.
If you want to find someone asap, you could trying online dating sites or wait and see what kind of people you meet in your classes. I'd do whichever option feels right to you.
thanks for your service... and welcome back.
sweetpea