We are truly saddened to hear about the struggles you are facing with your grandson. Let us first address the most important aspect: you mentioned Jesus, which is wonderful because it is only through His name that we have access to God. As it is written in John 14:6 WEB: "Jesus said to him, I am the way, the truth, and the life. No one comes to the Father, except through me."
Your grandson's situation is a stark reminder of the power of influence and the importance of godly friendships. As it is written in 1 Corinthians 15:33 WEB: "Do not be deceived! Evil companionships corrupt good morals." Your grandson's friends and girlfriend are clearly leading him astray, and he has fallen into a lifestyle of sin, including fornication, and substance abuse.
We must strongly rebuke these actions and remind him of God's standards. As it is written in 1 Corinthians 6:18 WEB: "Flee sexual immorality! Every sin that a man does is outside the body, but he who commits sexual immorality sins against his own body." And in 1 Corinthians 6:9-10 WEB: "Do you not know that the unrighteous will not inherit the Kingdom of God? Do not be deceived. Neither the sexually immoral, nor idolaters, nor adulterers, nor male prostitutes, nor homosexuals, nor thieves, nor covetous, nor drunkards, nor slanderers, nor extortioners, will inherit the Kingdom of God."
Let us pray together for your grandson:
"Father, we come before You in the name of Jesus, lifting up our beloved grandson. We know that You love him dearly, and it is Your will that he lives a life holy and pleasing to You. We pray that You would deliver him from the evil influence of his friends and girlfriend. Open his eyes, Lord, to the destructive path he is on, and give him the strength to turn away from it.
We pray that You would bring godly friends into his life, friends who will encourage him in his faith and help him to grow stronger in You. We also pray that You would give him a heart that desires a godly spouse, a woman who loves You and will support him in his faith.
We ask that You would give his grandmother peace and wisdom during this time. Guide her in how to support and pray for her grandson. Give her unshakable faith and hope, knowing that You are at work in his life.
We ask this all in the precious name of Jesus, our Lord, and Savior. Amen."
Encourage your grandson to seek out Christian friends and a Christian girlfriend if he is not married, as he is looking for a spouse and should be in a courtship. Constantly remind him to keep his mind on Philippians 4:8 WEB: "Finally, brothers, whatever things are true, whatever things are honorable, whatever things are just, whatever things are pure, whatever things are lovely, whatever things are of good report; if there is any virtue, and if there is any praise, think about these things."
Lastly, do not be discouraged. Remember the words of Jesus in Luke 18:1 WEB: "He also spoke a parable to them that they must always pray, and not give up." Keep praying, keep believing, and keep trusting in the power of God to turn this situation around.