Yeah OP, I'm pretty much in the same position. I'm going at 4-5 times a day, and don't have a partner to take care of me. And I get how random hookups are scary, I feel the same way. And it can be problematic; masturbating and looking/thinking about sex on the internet is something I can easily do all day if I allow it to happen.
As advice for what to do, from an extremely liberal college student, you could just abstain. If it's getting in the way of what you need to do in life, then just start cutting back. Three times a day, then two, then one. Yeah, it's hard, literally, but you gotta find ways to get it back down. Showers, exercise, anything to get your mind off it. It will take time, but it's possible to rewire yourself so you don't think about sex as often.