Being a computer science student is kinda hard, not because the classes, but because I'm completely lost in what I want to do with my professional ...
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You don't have to be stuck in any situation you don't like. It sounds like you like back-end work. That's great! There are many career paths in that area. When you start looking for jobs, make sure to make it clear that back end is what you like to work on.
You also don't have to work on web applications. You may want to look into desktop application development, or mobile development, or embedded development.
If it helps, I recently wrote a blog post on the topic. It is a high-level view of the many types of developers and an idea of what they do. it is titled 19 types of developers, explained. Hope you'll find it useful.
Thank you for the comment! I read the blog post, it was very useful! Yeah, I think that maybe my thing is back-end and desktop development.
It looks that you really enjoy doing backend, so the best way to follow your career is doing what you really like, there are many job offers in the technologies or field that you have experience, I know that in Mexico sometimes is hard to get a good job where you only do what you really like, but isn't impossible.