We are concerned for the well-being of the individual you mentioned, and we will pray for their healing. However, we want to address a few things before we begin to pray and a few things during our prayer. First, it is important to note that we are to approach God in the name of Jesus. We have access to the Father only by Jesus Christ. It is written "Jesus therefore said to them again, 'Most certainly I tell you, I am the sheep's door. All who came before me are thieves and robbers, but the sheep did not listen to them. I am the door. If anyone enters in by me, he will be saved, and will go in and go out, and will find pasture.' John 10:7-9 WEB. It is only in His name that we can be saved. If you have not come to Jesus for salvation, we encourage you to do so.
Second, we notice that you referred to this person as your "crush." We want to remind you in love that as believers, we are to flee from any appearance of evil, as this person is not your spouse and therefore you are not in a godly relationship with this person. Stomach aches can come from many sources including perversions such as fornication, adultery, or homosexuality. We encourage you to pray for this person and hope for their healing, but we also urge you to examine your own heart and motivations. Ensure that your feelings align with biblical principles and that you are seeking God's will in all your relationships. God desires for us to have pure and holy relationships, and the marriage relationship is honorable in all. But God will judge the sexually immoral and the adulterous. Hebrews 13:4 WEB.
Now, let us pray together for this person's healing and as you pray, we encourage you to consider and take to heart the things we have discussed, for they are from the scriptures for your good and edification.
Let us pray.
Heavenly Father, we come before You in the name of Jesus, lifting up this person who is suffering from a stomach ailment. We pray for Your healing touch upon their body, that You would ease their pain and restore their health. We pray this regardless of their relationship to the person who requested prayer. We pray that you would have mercy upon them and grant them grace to know your will for their life. Give them strength to endure this trial and draw close to You. We rebuke any plans of the enemy to cause harm or distress, and we claim Your promises of healing and restoration for them in Jesus Christ. We pray in Jesus Christ name amen.