Should I Write Letters of Closure to My Family?

About a year ago, I was diagnosed with a terminal health issue (not cancer). Three doctors told me I could "go any day," despite appearing healthy. I decided to tell my family, but it didn’t go well. My adult son, who was living with me, said he didn’t want to hear it and moved out two weeks later, saying he didn’t want to "find me" when the end came. I haven't heard from him since, despite texting him. My mom dismissed it as, "I believe you believe this," and said my adult daughters didn’t care to hear about it. I tried reaching out to my youngest on social media to apologize for our rocky relationship and explain my situation, but she blocked me.

Since then, my health has worsened, and I’ve had to move back in with my mom, which has been rough. She insists this is all in my head and pushes me to be active, despite doctors saying I can’t engage in any activity. The holidays were especially hard...I wasn’t included in any festivities and found out they ate at 10 a.m. on Christmas without telling me. I had prepared most of the food the day before to help cut down on the craziness of Christmas.

I have started counseling to cope with the grief, and my counselor suggested I write letters to my family. The problem is, I don’t have anything nice to say. When I needed them most, they weren’t there for me. I feel hurt, angry, and abandoned. Has anyone been in a similar situation? How do you write letters like this when you’re carrying so much pain?