Think about what is causing your stress-feelings and why. There are many causes of stress and they differ with each individual. You will all know people who seem to thrive in situations you could never cope with. Don't compare yourself to anyone else. If a situation makes you feel bad but doesn't affect anyone else, it does not mean there is anything wrong with you.
People respond to things in different ways.
Many situations you would expect to be seriously upsetting and stressful, such as bereavement, divorce, job change, or redundancy. But often it's a build-up of smaller, less easily identifiable anxieties that together can cause such a state of tension that the slightest additional problem causes you to 'blow a fuse'. Become aware of the pressures you are under, and try to monitor your stress levels regularly perhaps by keeping a stress diary to keep them from getting 'out of hand'.