and love, it is a good marriage. If you can not have love anymore, there is duty that requires you stay in your marriage. Just like 拥抱哥 said,不该离,因为这种情况太正常了,这要是该离,那一多半婚姻都该离婚了. But God gave us marriage to help each other to live a happy life. Maybe you can go to church, read Bible, you may find the truth of marriage and life.
Wish you the best.