Girlfriend cheated on me with her best friend and is confused about her sexuality what should i do?

My girlfriend cheatd on me with her friend who is a girl and we decided to take a break until she sorts her head out and im not sure how do deal with this and what if she decides she is gay then what do i do my heads a mess and i dno how to deal with this iv stoppd txtn her nd talkn to her to giv her space to herslef.