Its sounds like your jobs have been benificial to you in the past even when they suck...and when you do find one you really enjoy it'll be that much better!!
I had someone come in one day when I was working cashier, who out of a random act of kindness gave me a little stuffed animal because I helped her with something over the phone (she made them by-hand for a living). It froze me up a little because it threw me off guard, just like how that customer asking for you at the cash register did. I was polite and nice, but basically just happy and scared.....really messed up emotions. Basically the feeling was I was happy to receive such a gift and it made my day, but I felt an enormous wave of self-judgement slip over me. Like she had to really like me or else I wouldn't be worthy of her kindness. The thing with that was, it really didn't matter how I came across just that I was there to receive her gift.
The second thing is I know I get in my head that people don't like me and many times generalize it to huge groups of people, like everyone I work with. When that happens its like one million times harder to do your own job from the feeling of isolation, specially if the job is excruciating. The benefit when there are other people to talk to is that you can rant and vent about all the shitty shortcomings of your shared, chosen calling. Anyway, the generalization of this thought is the worst thing in the world, but there is absolutely no way that everyone on the job dislike you. I find that we really have no clue what anyone is thinking unless they specifically tell us and even then they could be lying.