Story time

Im a dumb bitch. I have this one person which I met her like during the first day of kindergarden basically we're childhood friends, she's been at my side the whole time. We're very close till the point that we'll take showers tght and sleep tght. I always sees her as my other half.
She came out to me as pan (which I have not mentioned yet I'm bi) She would often times flirt with me and I don't rlly know whether it's real or a joke so I often time just play along.
One day she like suddenly became so srs and she texted me "k.d.k.n.d.o.k.k.m.h.n.h.n.n.k.w.d.n.m.k.n.k.d.h.k.w.t.k." I didn't really know wht it means so I just like laugh it off as a joke... She started to like text me less and avoid me. Then she completely ignored me.She still goes to the same school but not close anymore.. I think I hurt her.. What should I do? We're bout to graduate soon..