How To respond to an ex asking how you are
It really depends on what makes you feel comfortable
Responding to an ex asking how you are all depends on the relationship dynamics and how this relationship ended. You definitely need to remember that there is no right or wrong in this situation, and it really depends on what makes you feel comfortable.
First, you need to decide if this is an interaction you want to enter. If this was an unhealthy relationship and ended with trauma, you do not owe that person a reason why you may not be responding.
If you feel you want to engage, you will most likely want to establish healthy boundaries.
Take your time and think about how this interaction will impact your life moving forward. You will also want to process your feelings and think about what you want to write back.
Consider these questions:
Do you want to move forward and leave the past in the past?
Do you feel you have closure?
Are you entering a new relationship and you feel this may interfere?
Be assertive and use open and honest communication. At this point, you have nothing to lose and can only gain your own sense of self-assurance by being true to yourself.