I think she has some cheek to expect you to wait for her while she's out shagging around and catching god know what diseases,and expects you to take her back,no questions asked!
Ill tell you now,there's not many people out there who would tolerate that behaviour..
Did she say she loved you?
Does she love you?
She is taking a risk not only with her health and yours should you decide to take her back but what if she decides to stay gone,she said she was coming back.....I would not trust that for a second.
This is hurting you,and she claims to love you!
Sorry,that's a joke.
Move on,kick her to the curb and forget her...
I recommend no contact and no marriage.