How bad is the phrase might not?

I went with a girl for about a year. Then we broke up for 7 months - in March she texted me and we have seen each other a few times real casual. It has seemed to be pointing to us becoming a couple again based on how she acts and what she says. However she did say today that ';you never know, we might not get back together';. How bad is ';might not??How bad is the phrase might not?
egh dont think shes interested





PlEaSe HeLp Me!!! =[



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