My girlfriend asked if I wanted an open relationship. I don’t understand why, has she got feelings for this other guy?

Long story short:

I’ve come to visit my girlfriend. She told me just before I came that she had met someone.

Ever since I’ve been here, she and him haven’t spoken.

A few days ago she apparently talked to some other guy (a friend) who told her that maybe the solution would be to have a open relationship. Something I’m against. Anyway, she told me she thinks we should.

I don’t understand why, has she got feelings for this other guy?
My girlfriend asked if I wanted an open relationship. I don’t understand why, has she got feelings for this other guy?
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