You Sacrificed your 'Self' for Her to be happy; and turned out to be her happiness.
She is happy. Thanks to You.
You suffer still...
And You still call yourself 'Selfish'?
There's a difference between bieng in a relationship;
and bieng in Love.
She chose the former. God Bless Her.
You chose to be in Love. God Bless You more.
For You were not selfish...