I want to be a dentist and I have an offer from birmingham to start in october 2012. Looking at what my dentist is like and what my friend's dad is like (he's a dentist) I am quite worried that i'm not mature/professional enough to be a dentist. I joke around with my friends a lot and I can act quite dappy and people at work say that they can imagine me as some sort of mad lady with a drill. Which I sure hope i'm not like but you never know.
I don't think where I work helps a lot either... I work at a hairdressers and they all often mess around/talk about going out and getting really drunk with fake boobs and how amazing TOWIE is aqnd call me a 'goody goody' which gets on my nerves because when people say that, it's blatently obvious that they don't actually really know what i'm like because they say things like you will come out with 4 A*s for my a levels, which I know won't happen and I'm not expecting it to happen either.

How can I get rid of the feeling of not being professional or mature enough for dentistry? - I don't want to get there and not fit in! Thanks