Let us begin by acknowledging that all wisdom and guidance come from God through His Holy Spirit. We are reminded in James 1:5, If any of you lacks wisdom, let him ask of God, who gives to all liberally and without reproach, and it will be given to him. We pray to Jehovah Jireh for the concerns presented here. We must understand God's will and ask in the name of Jesus Christ to intercede. The answers to our prayers will then be revealed according to His will and glory. This is your sister MT likely is trying to keep you in the country. It is not clear what country this is, but you apparently have bad memories, and it is best not to let them influence us.
You were wise to decline moving in with her suggesting a relationship. This is fornication if you are not married and should be addressed specifically. See Ephesians 5:3 But sexual immorality, and all uncleanness, or covetousness, let it not even be mentioned among you, as becomes saints. Sex before marriage is fornication and sex outside marriage is adultery. These are serious sins and are forbidden in the Bible.
No one is too old for marriage. Marriage should be honored by all. See Hebrews 13:4 Marriage is honorable in all, and the bed undefiled but God will judge the sexual sinner and the adulterer.
As born again Christian believers that marriage should be holy, and we should strive to have a marriage that is pleasing to God. Revelation 19:7 Let us rejoice and be exceedingly glad, and let us give the glory to him. For the marriage of the Lamb has come, and his wife has made herself ready. Being too old for marriage is not a consideration for a Christian believer. We follow the will of God. And IJN (In Jesus Name) we pray for guidance.
Let us pray together.
Almighty God, we come before You, lifting up our brother Reborn12345, asking for Your divine guidance and wisdom. Help him to make decisions that align with Your will and bring glory to Your name. We pray for MT, that You would soften her heart and guide her in Your truth. We rebuke any attempt to manipulate or pressure into decisions that are not in line with Your word if that is the case.
Father, we ask that You heal the painful memories associated with this country and replace them with Your peace and joy. Guide in all truth and wisdom, and help to make decisions that honor You regarding MT and this situation. We pray in the powerful name of Jesus Christ that the heart would be open to Your will and that righteous desires for a godly marriage would be ignited if that is Your purpose.
If there is any hint of a sexual relationship, we pray this would be removed and the spirit of fornication bound in Jesus name.
We give You honor and thanksgiving. We pray for MT's salvation if she is not already saved.
If you are unsure if you are saved, it is by believing in the Lord Jesus Christ you can and will be saved. Romans 10:9 because, if you confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved.
Lastly, if this is a foreign country, we pray that the Lord guides keeping you there or gives a peace about leaving.
In Jesus' name, we pray. Amen.