Zim on 09 September 2007
Parokki, ore is fine to use amongst close friends. Although in my experience it really varies. I have been friends with guys for a year and they still constantly use boku, others I know for like a month and they will use ore.
Tbh if the other person is of the same age and you are friends I would just use whatever they use. If you are ever unsure what to use then just use watashi, the worst that can happen is people will think you are overly polite.
Also Japanese teachers can be quite outdated on this stuff. My teachers had told me that no girls ever use da, always at the very least they would say desu. The reality was quite different.
