I'm going to check my boyfriend's social media accounts.
I'm curious what you hope to gain from checking in on your boyfriend's social media accounts?
I'm going to understand what type of a person he really is
You should not spy on your boyfriend online, if you have trust issues than you both should work on fixing that instead. If you spy, you may come across something that causes problems to develop between you two. It's important to note that some people do not take social media  posts as serious as others.
It's not a big deal. Plus, I've done nothing wrong. I just want to know what kind of a person he is.
If you want to know more about your boyfriend, then ask him questions and spend more time with him. It's unacceptable to spy on someone that you're supposed to love.