What can I do to ensure I will not be harassed in college?

A while ago, I was on the bus, and some random girl for whatever reason decided she would get in my face and try and intimidate me and degrade. I was about to lose my cool as I had other mishaps happen I my life around the same period and wanted to avoid any charges by not giving in and assaulting her. (I’d rather not have to use kung fu I've been practicing for over half my life to brutally beat a woman. Kung fu is lethal,) so I tried to just ignore her and get on my way home. Very same day shortly after the incident her and a car full of her friends decide to ride by yelling menacing words. This happened a few months ago. Now unfortunately I'm faced with one of these people again, I guess one of them attends my community college. And I caught her pointing at me the other day and clearly speaking about me. I have also had different run in-some of her friends since that incident, (where they were the ones giving threatening looks and talking of assault). One of the times I was able to avoid the fight, as I took out a makeshift weapon (Kali sticks) (we were in a store and I was outnumbered) and the sight of a weapon was enough to deter them. My question is, what do I do now? I don't want to have to put up with petty thugs in college I want to get my education. I've done nothing to any of these people. Am I even eligible to file a police report with everything given? If the one who goes to my school confronts and tries to terrorize me, am I able to tell her that I will hurt her if she touches me? Then go across the street so if she/they do pursue me I won't be disrespecting the school grounds if a fight does ensue.