as a young adult with similar mental health circumstances I hope I can help.
Its great she is receiving medical help to improve her wellbeing! That shows she is willing to help herself.
Unfortunately in moments of sadness and anxiety, I too push people away from me that I care about. It’s not necessarily reckless behaviour, but she may fear she will emotionally hurt those close to her and she wants to push them away before they can do the same to her.
You have got to reassure her everything is ok! She is still the same strong women she was before the camping trip and her boyfriend is still a lovely men who has her bests interests at heart.
You’re a great Mother! Good luck :)