Where do you attend college? Perhaps there are support groups through local hospitals or even through the health center on campus?
Do you attend a large college? I am just recently diagnosed... and am also a freshman in college. I go to a medium sized campus and randomly met another type 1 diabetic in one of my classes last semester.
I also found out just yesterday that one of my good friends plays volleyball with someone who has type 1 diabetes. I have yet to meet him, but I'm sure I will eventually through my friend. If you are on a large campus, I'm sure there is bound to be one or two other people who are diabetic. I would definitely talk to the health clinic or even the disabilities services. I am apart of the disabilities services and I'm sure if I asked them to tell others my name (like give them permission since there is the confidentiality agreement) they could tell other type 1 diabetics that I am looking to talk to people. So perhaps that could be an option for your girlfriend.
Also have her join this site! I'm sure just talking to someone, even not face to face, could help. Sometimes it's even better because you don't have to worry about them judging you. I feel that I can say anything I want on here because I don't know any one here personally.
Best of Luck!
Feel free to keep asking questions. In no time I'm sure you will find out a lot about diabetes from others on this site and then will help to relate to your girlfriend. I think it's awesome that you want to help her and relate more to her.