I actually like this direction, because if he talk smack about how he'll keep her safe and marry her in the future, it'll be a complete red flag about whatever happening next.
By saying he wants to stay away from Mika, he actually activates the legendary protagonist plot armor, which always works whenever a protagonist awaken their negative and pessimistic thinking.
If you don't get what i'm saying it's okay, but if you know, you know lol