Is it normal to feel like a different person around different people?

I hate how I feel like a totally different person when I'm around certain people. It's like I'm happy and feel good about myself then when so and so walks in, I transform into someone I don't like. Yes, the people I end up feeling different around I happen to not be so fond of so maybe that's a factor? What does this say about what I go through regarding feeling like a different person? Its annoying because I turn into this person they think I am which I don't like so it's as if Im proving they're right about who I am. So for ex, they think I'm this stuck up girl who's really girly when really I'm not, however, when Im around them, I feel like that so that doesn't help my case. When I'm around people I do like, I know who I am, they treat me like the person I really am. Could I like those pple because they see the real me? and could I dislike those pple who make feel different because they see a false perception of me? At the end of the day, I don't like how I feel around certain people and wish I can get rid of them for that reason. But unfortunately I can't. It is a pretty psychological disaster that I've been going through for a while now.