People with a dismissive-avoidant attachment tend to suppress and hide their feelings, and they tend to deal with rejection by distancing themselves from the sources of rejection (i.e., their relationship partners).
Did you catch that last sentence? No wonder it's so easy for me to NC and detach!
WOW. You have been the super-detacher, that's true... but there was one post I recall where you told me all about losing it when you were staying at your SILs...so I reckon 'attached' is in your repertoire also!! Sounds like you have a good therapist. What sort is he/she?