I'll kinda echo what some of the others have said, and say why bother labeling yourself?
You're not (or you shouldn't be) defined by labels such as gay or straight (or even bi or bi-curious). The problem probably comes with society defining everyone as striaght by default and so almost requiring people to redefine themselves so that society still has a label & box to put them in.
Most ppl at some time will have problems IDing sexually, it took me a year to realise I was bi even tho my best friend, who I'd shared a bed with about once a week for yeeeaaarrrsssssss, was constantly flirting with me.