Just because saints are very special in the Catholic Church does not mean that they are worshiped. Catholics do not worship saints. A saint is someone who has lived their life so perfectly in the service of God that they changed others around them while they were alive on earth. Their example was exemplary. If their life was so exemplary on earth, they can only be perfected to the utmost in heaven.
Catholics do ask saints for intercessory prayers.
For example, if your dad is dying, you may ask members of your church to pray for him. Ok, I know what you are going to say there is no one in heaven. And Jesus said unto him, Verily I say unto thee, Today shalt thou be with me in paradise. And as he prayed, the fashion of his countenance was altered, and his raiment was white and glistering. And behold, there talked with him two men, which were Moses and Elias.