koppite - i can't add much more than the advice & support you've received from others here.
we all do crazy things in the name of love/lust....but it is not your own fault. it takes two to make anything happen & she definitely took extreme advantage of your feelings.
what i will add is that this is a caring community and there are many here who have offered an ear to listen or a shoulder to cry on.... please find refuge & support here & use this time to heal.
take very good care - cookiecat