How would you react when an ex greeted you a happy birthday?
Well, first of all… Don’t react. Never ever react. But…
Ahm… Say, thank you?
Be polite. Restrictively polite. If there is even such a thing.
And that’s just what I did. Period. Sent a thank you message with the plainest smiley character in the end.
Remember, it should not hint her or make her feel responsible of responding back, again. Or anything sorta like that.