He was glad , he didn't need to ask who touch me because he knew she will touch him before she even decided that. He said it so people around him can see what just happend . She had faith that he is Messiah and she is not worthy of asking him , but she at least can touch his clothes . This position when she humble herself and believed on him made her be able to be healed .
Same when roman soldier asks Jesus to say a word when his son was dying . He had faith and believed that Jesus does not have to travel with him but he can only speak word and his son will be healed . It's faith without proof.
Many gentiles had more faith than Jews who were seeking after a sign even when Jesus was dying on cross , they told him to come from cross as sign .
If He knew before hand ,why did he ask who touched me?
Why did the power go from him without his foreknowledge?
Jesus looked at the Woman and said (Daughter thy faith has made there whole)
He did not say Daughter be healed,or command any healing Himself.
All Jesus wanted for mankind was to have faith in God.
Our salvation rest upon receiving God's grace through faith.
Our entire life is based on faith.
To qualify my statement,when you fear anything you have faith that what you fear will come upon you.
If we can have as much faith to know that it's God's will that we have no such fear,we live in the victory Christ died for.
2 Timothy: 1. 7. For God hath not given us the spirit of fear; but of power, and of love, and of a sound mind. 8. Be not thou therefore ashamed of the testimony of our Lord, nor of me his prisoner: but be thou partaker of the afflictions of the gospel according to the power of God; 9. Who hath saved us, and called us with an holy calling, not according to our works, but according to his own purpose and grace, which was given us in Christ Jesus before the world began, 10. But is now made manifest by the appearing of our Saviour Jesus Christ, who hath abolished death, and hath brought life and immortality to light through the gospel.
The same will of God applies to many aspects of our lives.
The problem is that not many teach what God's will is,and people believe what they are taught rather than what God's Word says.
If God has not given me something then I do not want it.
It is the devils kingdom that brings fear ,and sickness and every sinful thing.
But man would follow Satan ,because man's pride does not want to submit to God's Word.
God rewards faith in him,and will open blind eyes to the truth.
The reward of pride and Satan is that of destruction.
No where in the New Testament, are we told to pray that Satan not afflict us,yet we are told to have faith in God.
The decision is up to you,choose to deny the power given to us over Death Hell,and the Grave ,or choose another way than Gods will.