I hear the struggle, I also work on a university and it is one of the most difficult environments a jew can find himself in. I think it is perfectly alright for people to think you are anti-social/awkward
. I think minimizing conversation is a good move, I generally do the same. A wise person told me once that when you're serving G-d and doing what's best for you, you might not always seem like the nicest person. Be polite and and courteous in your interactions, but there's no need to put yourself out there excessively in order to people please. You have a right to set boundaries and if people don't understand that or don't like you for it, that is just not your problem. I think it's also important to understand the danger of the slippery slope frank.lee mentioned. There are unfortunate stories of people who totally lose their way in this kind of environment, so it is definitely something to take seriously. With that being said, perhaps the best thing is not to overfocus on this and instead to focus on developing positive social circles. Going it alone is extremely difficult or impossible, but search out for the orthodox student groups on campus. There is very likely a campus chabad and also potentially other kiruv organizations like Meor doing work where you are. Get plugged in with them, connect with some solid chaverim, focus on your studies and don't hyper focus on this issue. Specifically, I would also focus on connecting with a campus rabbi who you can learn with and even spend Shabbos with. Learning and Shabbos are two essential aspects that will be your oasis from an environment that will otherwise drag you down.
