Great job going to the beach on your own! How freeing

As for the T situation, I'm sorry. Why do you think you crossed a boundary? Is it just because she didn't respond or were there agreements made? Part of being in DBT is that you have access to someone 24/7 in some form while doing DBT group therapy (my clinic has a coaching line and the various therapists take turns being "on call").

I hope you find some peace and rest.