No one gets to decide when your marriage is over besides you and, perhaps, your partner . . . or just your partner. There is no committee that makes the call to end your marriage or not. In other words, it's your life.
You take the wheel. You make the turns. You call the shots.
Being ashamed of being divorced is a total waste of your time and energy. It serves you no good. Be happy, be proud, and move forward. It is up to you to pursue your own happiness, however that looks to you.
No one gets to tell you how to feel about yourself. You choose, and choose wisely. It will set the tone for your life moving forward post-divorce.