Sure, but he broke up with her.
No reason to not move on and have a good life.
So loyal to whom? Their ex? The person who decided against this relationship?
They broke up not because they hated each other but because he didn't want to cause her any pain as she waited for him. Even so, it seems that he had planned to get back together with her anyways (writings on the comic book store). Neither of them were over their first love.