Thank you for sharing!
This is something they tell us in group as well as sometimes things from others can trigger stuff. Unfortunately they don't tell us how to do that.
To me it is really difficult. I either have to build walls around me and don't let anybody in much to keep things away from me. Or I am open to others allowing people in.
The first one is safer but also very lonely at times. While the second is riskier, but it sure feels nice to share with others and have friendships.
I wish I would know how not to go into these extremes. But it gives me a lot of hope to hear that this has improved for you and that change is possible.