vent, could be triggering?

hi!! so i’m seventeen and i’ve been working at my job for a few months now and i made the terrible decision of mixing emotions and work and i’m super attached to my coworkers. it tends to be hard for me to feel close to people but this is the closest i’ve ever felt to a group of people in my life. i have issues with abandonment, which doesn’t help the situation. another added factor is that in social situations i’m super awkward, so they really have no clue how much i value them and i don’t know how to properly communicate sometimes. as life warrants, some of these people have left the job. and i’m so terrified of one of the people i’m really close to just leaving. this wouldn’t be a problem if i had outside contact with them, but they’re all a decent amount older than me so we tend to only talk when i’m at work. despite our age, they all make me feel like i’m on the same level as them as friends which i really respect. but my main issue is, is that this has led to so so much anxiety over the possibility of being fired. since i’m a student with extracurriculars (cramming for college apps this fall) my schedule is super chaotic, and i’m always scheduled to work only one day a week, two occasionally. next semester i’d be able to commit to 2-3 days a week, but i’m also going to be a college student soon and that definitely won’t make my schedule any calmer. my boss is moving locations so a new person whom i’ve already worked this whole time is taking over. he’s super nice, but i’m terrified he’s going to see my schedule, identify me as the most useless worker, and fire me. i also have chronic back pain which i try my best not to talk about it, but there’s sometimes that i have to complain about it and request an earlier break because it hurts so much. getting fired would be bad by itself but with the added factor that i could lose my coworkers of which i’ve found such good friends in the past few months? i couldn’t physically take it. i tend to latch onto something i’m anxious about it, inflate it, and think about it constantly. that’s where i’m at, ever since i found out my boss is leaving i’ve been constantly terrified. i’m feeling so many things and i don’t know what to do about it.

i would like advice, if possible :’) i know i should suck it up and accept this all as life being life but i’m not coping and it’s hurting me a lot.