We are truly sorry to hear about the struggles you are facing in your marriage. Remember, God's desire is for marriages to be a lifelong commitment between a man and a woman, reflecting the union between Christ and His church Ephesians 5:25. Husbands, love your wives, even as Christ also loved the church, and gave himself up for it.
Firstly, we want to assure you that prayer is not failing you. God hears your prayers, and He cares about your situation and a similar situation is found in Isaiah 54 5 For your Maker is your husband; WEB Yahweh of Armies is his name. The Holy One of Israel is your Redeemer. He is called the God of all the earth. 6 For Yahweh has called you as a wife who is forsaken and grieved in spirit, even a wife who is married in her youth When she is cast off, A God*truly* of her sex's youth says. 7 For a small moment have I forsaken you; But I will gather you with great mercies. We understand that you may feel low and exhausted, but be encouraged by these words in Galatians 6:9 "Let us not be weary in doing good, for we will reap in due season, if we do not give up".
It is crucial to continue praying and seeking God's will for your marriage. Remember, His ways are higher than our ways, and His thoughts higher than our thoughts, and He works everything together for the good of those who love Him. In times of distress, cast all your anxieties on him, because he cares for you. He cares for the suffering that we endure and He is faithful and just concerning our sufferings.
However, we must also address that it takes two people willing to work on a marriage. While you can't control your husband's actions or feelings, you can focus on your own spiritual growth and obedience to God. Continue to be the wife God has called you to be, and trust that He is working in your husband's heart as well. Colossians 3: 18 Wives, be in subjection to your husbands, as is fitting in the Lord. 19 Husbands, love your wives, and do not be bitter against them. If your husband is moving on, pray for his conviction and repentance and whatever is God's best for you and your marriage.
It is also important to address that you mentioned that prayer feels like it is failing. Prayer is our direct communication to God. It is the vehicle by which we approach Him, and it is only through Jesus Christ that we have this access. Praying to anyone but God and Jesus Christ is idolatry. It is by Jesus Christ's blood that we can go directly to God. His blood cleaned us immediately when we believed. To continue to stay cleaned by His blood we must confess our sins. 1 John 1:6-7 6 "If we say that we have fellowship with him and walk in the darkness, we lie, and don't tell the truth. 7 But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus Christ his Son and the sacrifice cleanses us from all sin. Ephesians 1:7 7 in whom we have our redemption through his blood, the forgiveness of our trespasses, according to the riches of his grace,
Lastly, take care of your physical health as well. While it is normal to go through emotional ups and downs, do not neglect caring for the temple of God. Make sure you are eating healthily and exercising in between prayers and commitments.
Let us pray for you. But also know that you need to understand the words that you say in prayer and do not give up or take a break on prayer but continuously come on bended knee.
Dear Jesus Christ, thank You for hearing our prayers. We lif before You our Sister's marriage and ask that You work a miracle in her and her husband's hearts. We thank You, Father that You have forsaken no one and that You stand in the gap for her and the marriage. We ask for Your will to be done in their lives and for Your glory to be revealed in this situation. Holy Spirit help her to come to repentance, to see or remember what would have gone wrong in her life and to point it out to her so that she finds relief or healing in that remembrance and fix it. Help our sister not to focus on what she sees ought to be the way. It is not her battle, it is God's and he will prevail. Also God please help us both to say the words that are consistent with Your words or in the mind of Christ. Bring conviction to her husband's heart, and restore their marriage if it is Your will, Father. Help her to cast all her anxieties on You and to trust in You with all her heart. Bring her comfort, peace, and strength as she waits on You. Help her to take care of her physical health as well, and guide her in all wisdom. For all the glory we give to the Father, to the Son, and to the Holy Spirit, in whose name we pray Jesus Christ. By His stripes we are healed.