[Peter86]

There are people at my university who got to know me for the first time when I was still really socially awkward and kind of quiet (like some of my former classmates before we chose separate specialisations, or som people in my current music group that I joined about a month ago partly because I wanted to get used to being around people), but since then I have actually improved a lot at interacting with people and appearing relaxed and confident.
And the problem is, some of those people who initially found me quiet and insecure still seem to treat me as if I am that way, even though I feel that I act very differently and get very different reactions from some other people.
It's a bit discouraging when some people seem to have stuck to their initial impression of me, and now it's ironically enough they who appear insecure in front of me instead.
But I would feel more comfortable around them if they didn't seem so hung up on their first impressions of me, and it's also a bit frustrating since I was very used to being social and talkative when I was around 13-16 years old, so I would like to regain that part of myself without being discouraged like this.
I notice that they sometimes smile while I am talking to them and seem to react positively when they see me interact with other people, but they also seem insecure and awkward around me as well.

What would you suggest that I should do?
I have heard that it's sometimes very hard to change a first impression, but hopefully not impossible, hah.

[s4ndm4n2006]

you don't change a first impression. you make new impressions with people. if you're more comfortable interacting now, just continue to do so and people will form their own opinions. you can't forcibly change anyone's view of you so the only thing you can do is be yourself, with the new behavior patterns

[MickeyCheeky]

I'm sorry you're struggling, Peter86 You can't change the first impression people have on you, unfortunately. The only solution is to continue to behave like you're doing at the moment, and hopefully at least some people will look past it and start seeing for who you are now. And if they don't... well, it's their loss.

[Peter86]

Thanks, hah yes, "change first impression" was kind of the wrong description;
what I meant was of course "make them realise that their first impression of me doesn't really mean that much today".

I will stick to my new behaviour patterns, and see what happens.