Reinventing yourself is totally normal. So would be something like getting a new username or whatnot. But when you reinvent yourself, you're still YOU. If you aren't you, then you're just being fake. And lying about it isn't healthy or fair to anyone at all.

It sounds though like you've starting to find the YOU that's in between all the bipolar annoyingness, and that's a great thing. And it is great that you've brought up who you were with people here - honesty is always the best way to go if you want to have someone's respect and trust for the long haul!