**Kicks Phil06 up the arse** don't let people at work / work life get to you so much! It's work, not life and you will move on to better things.
Chill out man, i've been there too, i was 17 when i started my 1st job and was there for 2 years and it was awful the way i was treated and it really affected me too but i didn't realise it at the time, if you must, then sever ties with the people you don't like and keep the ones you do like.
And stop analyzing it all! What good does it do? Yes you have some worries about getting a new job now, but don't let it get you down, atleast your away from that crappy job.
Some people say a job is a job and you should just get on with it but i disagree, it's your life and if you don't like it for any reason and it gets you down then i would change it.
I walked out of the job mentioned above and didn't tell them, just got my stuff 1 day and walked out with my middle fingers raised up behind me
I then found a really good job and i had no references and only have GCSEs.