Wow, you sound so confused! Like how can you like something and then hate it at the same time? Also listening to what other people think is probably what's confusing you in the first place...
Just ignore the rest and focus on what you want. After all it's your hair, so ask yourself if you like it? Simple...no more questions about whether it's suitable or now - actually if you study or whatever you might want to take that into consideration.
Just dye your hair back?... What else is there to do.
