Do you struggle with this?
It's the lack of ability to identify and describe emotions.
Some examples are:
Difficulty identifying different types of feelings
Limited understanding of what causes feelings
Difficulty expressing feelings
Difficulty recognizing facial cues in others
Limited or rigid imagination
Constricted style of thinking
Hypersensitive to physical sensations
Detached or tentative connection to others
I personally really struggle with this and actually avoid any extremes of emotion so that I don't feel confused by what I'm feeling.
I cry when I'm happy as the feeling is extreme and confusing.
I don't know if I've ever felt what NTs describe as 'love'.
I'm emotionally unresponsive with a flat expression and I smile or laugh at inappropriate times such as being told someone is ill or hurt.
Here's an article about it
www.autistica.org.uk/what-is-autism/anxiety-and-autism-hub/alexithymia#:~:text=1%20in%205%20autistic%20people,happiness%20on%20a%20joyous%20occasion.