The Catechism of the Catholic Church says:
2679 Mary is the perfect Orans (pray-er), a figure of the Church. When we pray to her, we are adhering with her to the plan of the Father, who sends his Son to save all men. Like the beloved disciple we welcome Jesus' mother into our homes, for she has become the mother of all the living. We can pray with and to her. The prayer of the Church is sustained by the prayer of Mary and united with it in hope. Reference
We should no more pray to Mary than we should pray TO one another. We should direct our prayers only to God. Mary is a Christian sister who has passed into glory. She was blessed to be the physical mother of Jesus and so was chosen by God to have a unique role in this.
Some say we should approach Jesus VIA Mary. If this is true, we should see it consistently in the Bible.
But what about the dying Thief on the Cross, who died next to Jesus? He approached Jesus directly, saying, "Lord, remember me when you come into your Kingdom". Even though Mary, the mother of Jesus was there at the foot of the cross, the dying thief did not appeal to Mary to appeal to Jesus.
Jesus answered the dying thief with words of comfort and the promise of eternal life. Amazing. This proves by direct example that we can talk to Jesus directly, without trying to use his mother as a mediatrix to get to the mediator.
Dear friend, approach Jesus directly with 100% trust. Forsake your sins and look to His Sacrifice for you. Do not be deceived by what the Catholic religion teaches you to do. The Bible shows a different way. You will only know the truth about this if you care ENOUGH about truth to search it out in the Bible. When you read the gospels and the Book of Acts, you will not find this incredible devotion to Mary anywhere. That's because God doesn't want you to do it.
"You shall worship the Lord your God and Him only shall you serve". (Matthew 4:10).