Never in the history of catholic church her members worship mary! It has never been and it will never be! The bible says; have no any other God beside me and the catholic upholds that.
What you see the catholics do is "honoring". In luke 1:1-30, you will see where it is said that; "from hence forth every generation shall called me blessed". Every generation not one generation! Also when angel gabriel visited mary , he said; "hail mary the lord is with you and blessed are you amongs women". God gave her the first honor by making her the mother of christ. Also, when christ was on the cross he said; mother they son and son they mother. He handed his disciples to his mother and verse visa. Are you a disciple of christ then you have to take mary as your mother because that is what we are obliged to do. That is the reason why catholics honor mary not worship her as claim by some pentecostal churches.