It's hard to imagine how to cram it down into a PSA but I'd like people to be more aware of the differences between a 'friend' and 'someone you have been forced to spend time with by circumstance.' As kids, so many of us have classmates we end up spending time with because they were just there and are told those are our 'friends.' Then people take that idea into the rest of our lives.
People need to be taught to have higher standards for friendship than 'the person my boss made me do an assignment with.' As hard as it can be to accept, if you don't trust a person to have your best interests in mind when making decisions which can impact your life, they are not your friend. They might be a buddy, a coworker, a neighbor, a countryman, a comrade, a pal, a cool guy, or something else, but they are not your friend. Don't let awkwardness force you into lying to say they are.