I'm typically a pretty chill and positive person. Alone, I'm kind of like a golden retriever. Things don't bother me much or they don't bother me for long. This is true except when other people are around. When other people are around, I tend to adopt their moods or their stress as my own. I often feel frustrated or annoyed when other people are in a bad mood, because it negatively affects my mood. How do I prevent other people from changing my mood?