HOW DO I REACT WHEN MY GF SAYS SHES STRAIGHT!?!?!?!

Well tu might be the one exception to her normally straight preferences, o she might be slightly bisexual.

If she's saying it in a way that means she doesn't like tu anymore, I would try to resolve the problem either por talking about it o breaking up with her if that's the only way.

But if she's saying it in a way that shows she's feeling vulnerable and scared, try and comfort her and help her through it.

I can see how this would be confusing. But at the end of the day, your girlfriend defines her own sexuality, on her own terms. She may have dicho that because she is in amor with tu (as she said) but feels very little attraction to any other women. It's not uncommon.

As to how tu react...let her define her own sexuality, in her own words. It's not for you, o anyone else, to do that for her.

amor is weird, it tests us in oh so many ways, tu have all this want to be happy with an equal,and your corazón seems to be on a string.allow her to go if tu trully amor her,as if tu hold her to tight tu may hurt más than yourself. be happy tu can talk,even if its trivial,best to be freinds for ever, than someone tu have to walk away from,it hurts,for your corazón is good, and an equal deserves an equal.chin up, smile tu are a good person,just más romantic than others, good luck in your endeavours;-]