Ok so since I went to this new school, i had a great reputation that lasted maybe a month. Now people especially girls seem less interested in hanging out together. Even 7-8 days ago everybody would just come to my desk and we all had a laugh, Im am supposly the "funny" guy in class. But since I went to this party and kiss closed a girl, these grls seem differet now. I mean they are still payig attention a bit attracred to me they seem like 2/3 more boring than before.

Any tips on how to get this relationship to go better before i totally become a loser? Any tips, anything? I want to get back as good as i was 2 weeks ago and people to me too.

Right so you mention a new school. How old are you? To begin with, you need to realise that these girls probably aren't completely mature yet if they are still in school.
The reasons I think which might have contributed to this problem:
1) Maybe they had a competition to see who could kiss you first? Then one did and they all lost interest?
2) Maybe you seemed needy when you k-closed this girl? Lost your value as possible Alpha Male.
3) First impressions rarely are completely true. It might sound harsh but maybe you aren't the "funny" guy that you thought you were? What were you like in your previous school?

I tried to translate your text but I don't completely understand what your question is? I hope I have answered it.