"Here is Rebekah; take her and go, and let her become the wife of your master’s son, as the Lord has directed."... Isaac brought her into the tent of his mother Sarah, and he married Rebekah. So she became his wife, and he loved her; and Isaac was comforted after his mother’s death."
In the Old Testament tradition, it is your father's responsibility to find you a suitable wife. You can pick out one that you want, but ultimately the father has the last say in obtaining a wife for you. Such is the story of Isaac and Rebekah with an interesting twist; It was Abraham's Father in heaven who directed and arranged the marriage.
Notice in v67 that Isaac loved her, despite having just met her. Why? Because the LORD already knows who is compatible because he searches their hearts. If you submit to His will for your wife, you will not be disappointed (and same goes for ladies). Because you know that the LORD has made directed your marriage, you know already that your marriage will stand on a firm foundation for what God has joined together let no man separate. (Mark 10:9)
Be content with where God has you. He knows what you need and when you need it and if he sees fit to give you a wife or a husband it will be not only the right time, but also the right person. Give up the chase and let God give you grace! Hallelujah!
Footnote: Of course this is all contingent on God actually being your Father...