All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His Slave and Messenger.
The Hadeeth says in absolute terms that whoever gets married, he has completed half of his religion, and it does not distinguish between a marriage resulting from love and one not based on love. The Prophet said: "Whoever marries he has completed half of religion, so he should fear Allaah in the remaining half." [At-Tabaraani, Al-Bayhaqi & Al-Haakim - Al-Albaani graded it Hasan (good)]
We have not come across an authentic Hadeeth which states that a marriage that is resulted from love is more rewarding. However, if a man is attached to a girl, and this love did not lead him to seek out something forbidden, like looking, corresponding and dating, and he sought to be connected with this girl in a lawful manner by marrying her, then he will be rewarded for being chaste and patient.
For more benefit, please refer to Fatwa 83306.
Allaah Knows best.