Well... there is a reason... and even without that... if he hadn't met her and her best friend... he and his best friend wouldn't have suffered that much.
His whole family was killed under the banner of treason and Dana, who even if they didn't love each other romantically was beside him his whole life, died to protect him.
Is the love of one woman worth that much? Love is not such undying unchanging thing. That would be pretty much enough to slowly kill a love. And as I said... there was an aggravating reason... ╮(￣▽￣)╭
Spoiler take with a grain of salt
Well when edgar was looking for arcane stella told him arcane’s whereabouts because edgar promised that he wont hurt him. This led to dana’s death.
i wonder what Stella did for arcane (ML) to hate her so much since in the last life he was supposedly in love with her