Your prayer arising from a lonely heart has been heard, and the sorrow you express is not hidden from the Lord. To feel lonely, and to have known the pain of a marriage where love and appreciation were withheld, is to know what it is to have a broken heart. Scripture speaks plainly of such wounds, for there are many who have been neglected and despised by those who once vowed affection, and they know what a broken heart means.
Take comfort that our Lord Jesus Christ knows this loneliness to its depths. He was left alone just when most, as Man, He needed human sympathy. His disciples forsook Him and fled, and none raised the shout to loose Him and let Him go. He can, as no other can, enter into the sorrow of that loneliness. You are not alone in your loneliness, for He has borne it before you, and He now lives to sympathize and to heal.
There is healing for such wounds, and it is found in Him alone. The leaves of the tree of life are for the healing of the nations, and the least thing about Christ is healing. Not only His fruit but His leaves, His gentle words, His presence, His Spirit, change the life blood and make the nature other than it was before. When Jesus healed the sick of the palsy He said, Son, be of good cheer, your sins are forgiven you, for pardon and healing are one. I would point you first to this healing, that you may know the forgiveness of sins through faith in Christ alone, and the mending of the broken heart by His hand. No notion or fancy of man can do this, it is the work of God, and God alone.
You ask that the Lord would pick a man for you, and you use the word twinflame. That word is not found in Scripture, and the thought behind it is not the teaching of the Word of God. The Lord does not give us a mystical counterpart by that name, but He does set before us a holy and good estate, that marriage is a lifelong covenant of one man and one woman, and that love, companionship and the union of life belong within that covenant. To seek a man in the Lord's will is not wrong, but to seek it as a twinflame is to seek in a way that will not satisfy. What your soul most needs is to know the Lord as your Husband. He found His people in a desert land, in a howling wilderness, and set His special love upon them as a husband does upon his bride. He communes with them most lovingly and provides for them as a husband with all his goods endows his chosen. If you are Christ's, God is already a Husband unto you, and to know His faithful love is the first cure for loneliness.
Therefore learn also what it is to wait upon the Lord. There is a waiting God who waits to be gracious, and there is a waiting people who wait in hope, not in despair, for blessedness in reserve. They are not waiting with restless counting, but with joyous and assured hope till the glory shall begin. If it be the Lord's will to give you a godly husband, one who will love you and cherish you according to Christ's love for His church, He is able to do it in His own time and way. Pray then not only for a man, but that you may be kept pure, patient and content in Christ while you wait, and that if the Lord does provide, it may be a man who loves the Lord Jesus, who will walk with you in faith and obedience.
Let us pray together. O Lord our God, look upon this wounded and lonely heart. Forgive sin through the blood of Jesus Christ, and let the Sun of Righteousness rise with healing in His wings. Heal the broken heart, take away the sting of past unkindness, and let this soul know that Thou art a Husband who will never leave nor forsake. Grant contentment in Christ, and in Thy wisdom and mercy, if it be Thy good will, provide a godly man for a holy marriage covenant, that together they may serve Thee. Keep this dear one from error and from seeking after notions that are not in Thy Word, and make Christ all in all. In the name of Jesus our only Saviour we ask it, Amen.