<human>: I'm M(21), she's F(19), and there's an ex (19).

We got together for 4 months, and she's my first girl, while i'm her second. I came in after she broke up with her ex for about 2 months.

Everything went well in the 4 months, so much so that she said she doesn't like her ex anymore. Then, the problem.

Her ex called her to meet up, and she went along with it. After meeting him, she said she realised she still had feelings for him and loves him more than me, but in the end, she chose me because

1) Her ex was abusive

2) She believes we'll love each other more as time goes

3) We have seen each other's parents, and she doesn't want to let them down (Yes we're asian)

However, despite that, she still refuses to take steps to 'forget' her ex(Delete msn, delete phone contacts). She said she couldn't 'let go'. Her reason for that is she constantly thinks of "what if" she's back with him, or "what if" she stays with me.  Should I stick, or should I bail?

Can you condense the text into three sentences or less?
<bot>: Read title. She loves both of us, him more. She chose me instead, but still loves him. What now?