It's funny. Everyone wants what they don't have. For example, those who are single wish they were married, and then there are an awful lot of married people who are miserable and wish they were single.
I understand the failure feeling about D. But I think it's more an internal thing you feel rather then what others actually think. Yes, there are going to be people wanting to express support for you. Change can be difficult for everyone. And there are some women who see D women as a threat to their own marriage, but overall I think the "failure" feeling is more a personal thing than reality.
We are always our own worst critics. I think you just have to be positive, love yourself and be aware and open to some of the opportunites you will encounter. Don't worry what the married people think. They probably are afraid it could happen to them and that's rightfully so because as all of us here know it CAN!
There is no arriving, ever. It is all a continual becoming.