If therapy isn't an option, could you possibly try a self help book?
There's one titled "Freedom from Selfharm: Overcoming Self-Injury with Skills from DBT and Other Treatments" that has good reviews.
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“All the darkness in the world cannot extinguish the light of a single candle.” -St. Francis of Assisi
Diagnosis:
Schizoaffective disorder Bipolar type
PTSD
Social Anxiety Disorder
Anorexia Binge/Purge type