<human>: So this girl, let's call her Abby, has been a best friend of mine, things went differently and we fell in love. The problem is that she's engaged.

Well to start off, this affair started when Abby's fiancée abused her (slapped her), and she had a fight with him. The next day she wanted me to be there for her while she tell me all her relationship problem, while i consoled her. It turns out that she had feelings for me and i considered this, and i also had feelings for her back then, but i didn't want to break down her engagement doors, but now i feel that her fiancée abusing her is too much, and i want to be there for her, so we started dating.

It's been three months since, and right now a part of me think that what i'm doing right now is wrong, but i love her too much. I already talked to her about this and she said she needed time for her fiancée to let go of her and she's trying to slip away slowly.

What rings in my head is that, what if her fiancée doesn't let her go? what will i get in return? I don't know what to do..

Can you condense the text into a few key points?
<bot>: started dating engaged bestfriend for 3 months, don't know where to go from here, what will i get in the long run?