Two friends started college together, but after the first year, one had to drop out while the other continued. How can they ensure this doesn't cause any issues for them in the future?

If your complaint regarding a serious crime was dismissed by the police station, you have the right to approach a higher authority, like the Superintendent of Police or even the court directly. You can also file a complaint under Section 156(3) of the CrPC to compel the police to register an FIR.