I'd say confront her.
If you love her and she repents, forgive her.
If you love her and she doesn't repent, let her go.
If she repents and you forgive her, bear no grudges.
If she doesn't repent and you let her go, don't end up a bitter
person.
All in all, be it this or that - it's a difficult time, take your
time to recover.