Let us first address the serious issues present in this request. It is commendable that you are seeking help and prayer for your marriage. However, there are several concerns that need to be addressed in light of biblical principles.
Firstly, it is important to acknowledge that marriage is a sacred covenant between a man and a woman, designed by God to be a lifelong commitment. The fact that your husband has thoughts about cheating is a serious matter that needs to be addressed with urgency and prayer. Infidelity is clearly against God's will, as the seventh commandment teaches us, You shall not commit adultery.
It is concerning that your husband is using an incident from your past, where another man kissed you, as a justification for his own thoughts of infidelity. It is commendable that you handled the situation appropriately by distancing yourself from that individual. Your husband should not use this past incident as an excuse for his own sinful thoughts. As it is written in Ephesians 4:32 WEB:
And be kind to one another, tenderhearted, forgiving each other, just as God also in Christ forgave you.
Secondly, it is worrying that your husband is not taking spiritual matters seriously. When you invite him to pray, study the Word, or watch sermons, he responds with jokes and refuses to participate. This is not a healthy spiritual dynamic in a marriage. As it is written in Ephesians 5:25-26 WEB:
Husbands, love your wives, just as Christ also loved the assembly, and gave himself up for it; that he might sanctify it, having cleansed it by the washing of water with the word.
A husband should be willing to lead his family spiritually and to take part in spiritual activities with his wife.
Let us pray together for your marriage and for your husband's heart to be turned towards God.
Heavenly Father,
We come before You today to lift up this marriage to You. Lord, we pray for Your intervention in this situation. We pray that You would convict your husband's heart and turn it towards You. We pray that all thoughts of infidelity would be removed from his mind and that he would be filled with Your Spirit instead.
Father, Forgive him for using his wife's past incident as a justification for his own sinful thoughts. Help him to forgive as You have forgiven us. We pray that You would soften his heart and make him receptive to spiritual matters. We pray that he would take the initiative to lead his family spiritually, to pray with his wife, to study Your Word, and to watch sermons together.
We also pray for you, that You would give you the strength and wisdom to navigate this situation. We pray that You would guide your words and actions towards your husband, that they would be filled with love, patience, and wisdom.
Lord, we pray for your marriage, that it would be strengthened and restored. We pray that it would be a testament to Your faithfulness and love.
We also notice that you didn't mention the name of Jesus in the request. We pray that you look to Jesus who is the only way to God. We cannot come to God on our own merit or goodness. We are all sinners, falling short of the glory of God. Jesus is the only way to salvation. If you have not put your trust in Jesus Christ as Savior and Lord, we pray that you do now. If you are already saved, we pray that you look to Jesus for guidance.
Finally, we pray that your husband would seek the Lord earnestly, that he would desire to live a life pleasing to God. We pray that your marriage would be a beacon of God's love and faithfulness.
In Jesus Christ's precious name, we pray. Amen.
Be strong and courageous, for the Lord your God is with you.
Prayer Focus: God, Thank You. Thank You for loving me. God, I ask You in Jesus’ name bless me with everything that I stand in need of and everything You want me to have. Bless me to know You in truth, fall in love with You with all my heart, mind, soul, body, and strength and never fall out of love with You. Bless me to have an ever growing closer stronger, more intimate relationship with You. Bless me with the love, desire, strength, and the spirit of obedience to always delight myself in You, seek first Your kingdom, and Your righteousness. Help and strengthen me God to always respect and obey You. Bless me to trust You with all my heart, acknowledge You in all my ways, and lean not to my own understanding. 
