You're right on both. She's not, and you shouldn't.

[And all else failing, if Sokka ever returns home, Suki will be there. It's a luxury Adell wishes he had with any number of the people he loved here, one luxury he admittedly envies Sokka for. But he won't say as such.]

...But it still doesn't make it stop hurting. Nothing wrong with that, though.

With time, the pain fades. It never goes away completely, though. It'll still rear its head sometimes. The question is... what you do with your memories of the past.