They know you’re Shomer Negiah, right (both the jewish and non-jewish students)? I think that once that’s clear to everyone, it eliminates a lot of problems.
Be good TO them, not WITH them. Smile when you say good morning, but make sure your smile says nothing more than “Good Morning” Guys will pick up the messages from your body language. You just make sure to convey the right message.
Good luck!