My Daughter's Friend Talks to Me About Her Emotional Problems
TeenHealthFX appreciates your concern. While your role in this situation seems to be beneficial to this teen's emotional health, it is not your responsibility to be available 24/7 as a mental health resource. Since this girl has indicated self harm, it is important that she receives help from a licensed professional who is available for treatment more often than the school counselor currently is.
Since this teen has indicated that she is not comfortable talking to her parents, it is best to contact the school principal and school counselor his/herself, and explain that this girl is in need of further treatment. Either of these parties will be able to refer you to another therapist whose schedule aligns closely with this teen's. This professional may also recommend community support groups that the girl can join.
TeenHealthFX understands that the thought of contacting these parties may be uncomfortable, however feels that it is the best decision in order to ensure this teen's safety.