There's a famous movie which used the tagline 'In space, no-one can hear you scream'. As it turns out, crying won't do you much good either. Space just isn't a good place to become terrified or upset, the environment conspires to work against you.
Canadian astronaut Chris Hadfield, who spent time on the International Space Station in 2013, took a wide number of questions from Earth, including 'what happens in space when you cry?' He demonstrated the answer on a YouTube clip, and showed that although tears can form, in a zero-gravity environment there's nothing to make them fall. They just stick to your face, forming an ever-growing bubble of water that will eventually spread and cover both eyes, or perhaps your nose. It's probably a good idea to take hankies with you and avoid watching tear jerkers to pass the time.