Genesis 34:3

‘And his soul was powerfully attached to Dinah, the daughter of Jacob, and he loved the girl and spoke kindly to the girl.'

The love was genuine, and his final aim was honourable. But as his actions showed it was a selfish love which had not considered the consequences of its actions. He possibly even thought that the girl should be grateful for his interest. He could probably hardly conceive that Jacob might not want his daughter married to a prince, even if he was a Canaanite and not of the tribe.