How should i know?

i have one friend that i think is bi but im not sure..so yea one of my friends yesterday ...we were walking ( shes a girl) and so am i ...we were walking and she said she wanted to hold hands so we did...and we were walking...and i said people are gonna think we are together..and she said ''well then theyll think that we are straight , how uncool would that be.'' and then later that day she said er my bread and then i said what does that mean and she said dont ask stupid...so ...w/e...but im bi ..and i kinds ike her...does she like me...