I have a hard time dealing with my t's vacations too, even though I've been seeing her for a long time. It is getting easier though.

My t and I prepare ahead of time for her trips. We plan things I can work on while she's gone, things I can do that are soothing or fun, and ways to cope if I get triggered. She has also at times let me take a special rock, piece of coral, or even her coffee mug to hang onto until she gets back.

Right now, my t is on vacation out of the country, and I am missing 2 sessions (total of 3 weeks between sessions). I hate it, but I am doing OK. Early in my therapy, I had a hard time just missing 1 session. So, like I mentioned, it does get easier with time.