My T is also a Buddhist and "preaches" self compassion to me all the time. It's incredibly difficult to practice but I am slowly finding it helpful. Over time, the idea is that you will always have a good friend with you to support you and tell you it's going to be ok. It sounds a bit hokey, really, but I am paying for therapy so I will at least try it. A book that I have found very helpful was Self Compassion by Kristen Neff and anything by Pema Chodron (already recommended here.)