Divorce is essentially a loss of a person. The "two that became one" are no longer around. It's healthy to feel sad about all the loss connected with the end of a marriage- loss of love, affection, financial security, plans for the future, identity. Give yourself time to move through the stages of grief, including denial, anger, bargaining, depression, and acceptance. Only once you've dealt with your emotions and accepted that your marriage is over can you free yourself to move forward.