My work hours are 9-5 but it seems all my colleagues stay later than that (I come to work on a morning to emails sent at 8/9pm!) and it gets commented on a lot that I shoot out the door at 5pm.
I don't particularly enjoy my job but I do it well and everything is done by 5pm but I get snarky comments that I leave at 5 and don't stay longer. I don't care for overtime pay etc. and just want to get home. (I've been here a year and the comments have been consistent)
Am I coming across as unprofessonal/is it making it obvious I don't absolutely love my job? My boss has never called me up on it it's just side eye and comments from coworkers but it's making me uncomfortable 
AIBU/rude? (I have anxiety so I'm probably overthinking this)