I think maybe start with the fact that the inner child doesn't need to be fixed per se. John bradshaw has an awesome series on youtube called Homecoming that I would really recommend. It was simple stuff like imagining yourself as a child and telling yourself that you were safe and wanted. He also says to write letters with your non dominant hand and just scribble anything and everything that comes out and write replies back to the child you.

There were also a few meditation videos that I tried- I really liked the one by Louise Hay.

P.s Like the other poster- I think this is the first time that I'm not freaking out about my T leaving. I've been seeing him for 2 years and after 5 holidays I know that he will come back. But I remember feeling so scared that first week he went away for a week and feeling that he would realize that his life was so much better without me in it.

Would you also be open to seeing another T whilst she was away? It won't feel the same, but it acts like a safety net just in case you need it.