You ask Mary to intercede for you because you deny what the Bible says.
There is one God and one mediator between God and mankind, the man Christ Jesus. 1 Timothy 2:5
Denying what Scripture plainly states...
1 Timothy 2
Easy-to-Read Version
God Wants Us to Pray for Everyone
2 First of all, I ask that you pray for all people. Ask God to bless them and give them what they need. And give thanks. 2 You should pray for rulers and for all who have authority. Pray for these leaders so that we can live quiet and peaceful lives—lives full of devotion to God and respect for him. 3 This is good and pleases God our Savior.
4 God wants everyone to be saved and to fully understand the truth. 5 There is only one God, and there is only one way that people can reach God. That way is through Christ Jesus, who as a man 6 gave himself to pay for everyone to be free. This is the message that was given to us at just the right time. 7 And I was chosen as an apostle to tell people that message. (I am telling the truth. I am not lying.) I was chosen to teach those who are not Jews to believe and understand the truth.
Special Instructions for Men and Women
8 I want the men everywhere to pray. Men who lift their hands in prayer must be devoted to God and pleasing to him. They must be men who keep themselves from getting angry and having arguments.
From the context, it is clear middle man has to do with the cross not prayer. We know from Romans 8 that the Holy Spirit intercedes too. Also, many saints on earth intercedes or prays too.
Job 33:23
“If there is an angel as a mediator for him, One out of a thousand, To explain to a man what is right for him [that is, how to be in right standing with God],
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Isaiah 43:27
“Your first father [Jacob] sinned, And your spokesmen [the priests and the prophets—your mediators] have transgressed against Me.
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Galatians 3:19
Why, then, the Law [what was its purpose]? It was added [after the promise to Abraham, to reveal to people their guilt] because of transgressions [that is, to make people conscious of the sinfulness of sin], and [the Law] was ordained through angels and delivered to Israel by the hand of a mediator [Moses, the mediator between God and Israel, to be in effect] until the Seed would come to whom the promise had been made.
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Galatians 3:20
Now the mediator or go-between [in a transaction] is not [needed] for just one party; whereas God is only one [and was the only One giving the promise to Abraham, but the Law was a contract between two, God and Israel; its validity depended on both].
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1 Timothy 2:5
For there is [only] one God, and [only] one Mediator between God and mankind, the Man Christ Jesus,
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Hebrews 8:6
But as it is, Christ has acquired a [priestly] ministry which is more excellent [than the old Levitical priestly ministry], for He is the Mediator (Arbiter) of a better covenant [uniting God and man], which has been enacted and rests on better promises.
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Hebrews 9:15
For this reason He is the Mediator and Negotiator of a new covenant [that is, an entirely new agreement uniting God and man], so that those who have been called [by God] may receive [the fulfillment of] the promised eternal inheritance, since a death has taken place [as the payment] which redeems them from the sins committed under the obsolete first covenant.
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Hebrews 12:24
and to Jesus, the Mediator of a new covenant [uniting God and man], and to the sprinkled blood, which speaks [of mercy], a better and nobler and more gracious message than the blood of Abel [which cried out for vengeance].
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