Student librarians laugh at me for going to the university library a lot?

What should I do? I live 20 minutes from campus so it makes no sense for me to drive home after every cl. I hear them laugh and gossip about me mostly when I enter and exit the building; not just that, but they also seem to have a problem with me. Once, as I was walking out, the girl at the front gate (with a major attitude) gave me an evil stare and muttered under her breath, "oh my God please just leave already like you always do every single day. Hahahahahahaha(silently)". Hundreds to thousands of students go to that library every day, so why do I feel like the only target? By the way, I sometimes hear them talking and laughing very loudly (about me of course) in my proximity. "it's after midnight. He's still here. Hahahahahaha"