I could use some advice!

I have a toxic co-worker. Anytime something happens in his life that upsets him deeply I end up being the target of his toxic stew. We have been working together for about 16 years so this is nothing new.what has changed is my level of Spiritually,it upsets me deeply ! I know all things are lessons God would have me learn but I don't hear the guidance of J and HS on this one. I guess I still have to many blocks in the way. I know forgiveness is always the answer but it doesn't seem to have much of an effect on him or me . I guess this lesson is bigger than simple forgiveness.. I'm not sure what to do about it. Advice would be greatly appreciated 🙏