One of the many universal truths we know is that high school and college are polar opposites. So the question is: why are you still acting like a high schooler when you're an adult in college now? The answer is simple. It's because you really aren't an adult at all. By age definition, I suppose you could consider yourself an "adult", but in terms of mentality, you aren't. It's time to grow up, and here's why.
You might not notice it, but others do. The way you view and handle situations are what define you and what can determine your remaining college career as well. Transitioning from high school is a big step so I understand why at first your mindset might be unclear, but you have to understand that the things that you thought mattered in high school, don't matter in college and definitely don't matter in the real world either.
College is a time to discover you and focus on yourself, so you need to spend less time concerned about the lives of others that don't have an impact on your life. Invest more time for you and the people you care about instead of gossiping and spreading unneeded drama like a plague on social media. The truth is that person is probably so centered around their own life and goals that they don't even notice your effort to get their attention anyway. This is one major quality that separates children and adults, which is the ability to handle situations with grace when problems do arise and avoid unneeded confrontation.
So my advice to you is to focus on you and not others that hold nothing but insignificance. You will never find happiness in the tearing down of others. So instead of focusing on the actions of others, focus on your actions and change your mindset from being so involved with others that you don't forget about yourself. It's time to grow up.