You didn't leave to hurt him. And you didn't keep Anne from him to hurt him, either. It was to protect both of them. Surely Porthos would understand that much.
Of course he wouldn't regret you. [You idiot.] That's... what you need to remember. He's with you now. He loves you. [...] It might -- make me jealous that Freya and Merlin care for one another, but in the end he's willing to wait for me to come back. He loves me.
... Surely that's what matters with Porthos, too. He loves you.