I am pretty upset with this guy in the gym.
What is your reason for being angry at the guy who is at the gym?
It's so hard to stay positive every day at the gym.
It's fine to be upset with someone that hurt or offended you. Standing up for yourself in the future will help you to feel more confident and less frustrated at the gym.
Don't be so negative Nate, how can you just keep going without punching someone?
If the person gave you a reason to be mad at them then it is fine! However, if you are upset for no reason aside from being in a bad mood then that is something that you need to work on. Sometimes doing a workout is just what you need to clear your head.