—“The data on neuroticism is suggestive of unfortunate findings – it is almost impossible to train out of (huge amounts, and consistent amounts, of time and effort leading to negligible improvements). That’s why it’s called a character ‘trait’ “— Andy Curzon
All you can do is practice how you respond to feelings. That skill is mindfulness. Not in the new age version of the word. But in the old: Skill at self monitoring.
The only answer I know of is stoicism. Whether you obtain it as my sister and I did by accident, or by intent, it works. You may not be able to train your emotions but you can easily train your reaction to your emotions and impulses.