Your dream reflects the internal conflict you are experiencing regarding your current college course and your desire to explore a different path that aligns more closely with your interests. Here are some insights into the various elements of your dream:

1. Returning to a College Course You Hate: This symbolizes the frustration and pressure you feel about continuing in a field that does not resonate with you. It suggests a struggle between obligation and personal desire.
2. The Meeting Room and Gathering: Being in a group setting might indicate a sense of community or shared experience with your peers, but the tension in the room signifies your anxiety about your current situation and the decisions you face.
3. The Killer and Escaping: The presence of danger (the killer) may represent your fears about the consequences of making a change or the challenges involved in shifting courses. Your instinct to protect Paulo and others suggests that you value your relationships and may fear letting others down.
4. Choices Between Hallways: The two different hallways symbolize the choices before you. The dimly lit hallway could represent the unknown, perhaps indicating fears about an uncertain future, while the well-lit hallway reflects the path that seems clearer but may not align with your passions.
5. Running and Hiding: Your desire to escape and act as if you are invisible shows a need to find safety and clarity in your decision-making process. The act of escaping through a small window indicates a desire for freedom and a new beginning.

The recurring theme of struggling with a decision about your future suggests that you are at a crossroads. Your dream is urging you to consider what truly makes you happy and fulfilled.

While I cannot provide a definite answer, it seems that the dream highlights your desire to pursue something that aligns more with your interests, such as multimedia studies or animation. Reflect on what excites you about these options and consider talking to advisors or friends who can provide support in your decision-making process. Trust your instincts as you navigate this important choice in your life.