פּירוש אויף בראשית 29:20

ויהיו בעיניו כימים אחדים, “these seven years went by for him as if they had been only a few days.” Yaakov considered having to work for seven years in order to marry Rachel, as cheap at the price, as if he had paid only the equivalent of a few days’ wages for her. This reflected how much he was in love with her. If Lavan had demanded a higher price, he would also have been willing to pay it. While engaged actively in labouring, however, he felt the opposite way and could not await the time when he would finally be united with her.

ויהיו בעיניו כימים אחדים, he considered himself as having struck a good bargain, considering Rachel as worth far more than seven years of his labour.

ויעבד יעקב ברחל, Jacob served for Rachel, etc. The reason the Torah mentions ברחל is that Jacob made a public announcement at the time that his service with Laban was for Rachel and that her hand in marriage was the wages Laban had agreed to pay him in return for his service. A major reason he made this public pronouncement was to make it clear that he did not serve for Leah.