Why is sadness so unacceptable in divorce?

My husband and I are getting a divorce. Sometimes I feel angry, sometimes hopeful, sometimes relieved, but often I feel sad. I feel sad that the man that I wanted to spend the rest of my life with does not return that feeling, I feel sad that I have to be single (when I don’t want to be), I feel sad that I will suffer financially (at least in the short-term) – in general, I feel sad that the life I thought I was going to have is not going to happen. I know that the future may hold something even better, but it doesn’t stop me from sometimes mourning my marriage and my imagined future with my husband.

I get very little support for feeling sad. My friends are all very supportive of the angry feelings and any kind of “he’ll be sorry when I’m gone” kind of talk. They also like to hear about how much better my life will get once I’m divorced. When I say I am sad, things get icy or I get turned in to a victim (a doormat who stays with her abuser (although there was no abuse and I am not staying)). When I told my therapist I was sad, she said that was normal, but in the next breath was on to the things will only get better speech. When I returned the next week and said I was still sad, then the conversation became about what was wrong with me and why I didn’t love myself. Two weeks after deciding to get divorced, I wasn’t allowed to be sad or still be grieving. Has anyone else experienced this?