Okay. Actually God doesn't cause rejection. People do. God loves it when people come together.
Matthew 19 “Haven’t you read that he who made them from the beginning made them male and female,* 5 and said, ‘For this cause a man shall leave his father and mother, and shall join to his wife; and the two shall become one flesh?’† 6 So that they are no more two, but one flesh What therefore God has joined together, don’t let man tear apart.”7 They asked him, “Why then did Moses command us to give her a bill of divorce, and divorce her?”8 He said to them, “Moses, because of the hardness of your hearts, allowed you to divorce your wives, but from the beginning it has not been so. 9 I tell you that whoever divorces his wife, except for sexual immorality, and marries another, commits adultery; and he who marries her when she is divorced commits adultery.”
Out of God's good will, he allows people to have choice. God built people to be able to choose to be like God or not. He choose for us to choose. It's a freedom. And freedom is a good thing. Even if you are the one the choice was said no to. One can learn to observe the side of the other person having freedom as a good thing. That makes having someone so special. The fact that they chose you. Makes being together with love special. People are built to have power to be like God. To have choice. God has been rejected by many people and by His most beautiful angel so go to Him because He knows how rejection feels more than anyone else.