Is it just the one coworker that makes your work intolerable? When your manager says you should ignore it and be patient, does she mean she expects your coworker's behavior to change or is her idea that you should get used to it... or that she's going to be gone soon? TBH, I would ask the manager to clarify this, 'Boss, when you tell me to be patient, do you mean that this situation will change soon?"

Is there anything you like about the job, any good points? Do you like your manager or the schedule, the work or the customers, the money?

I don't know how you make it more tolerable. Like the posters above, I struggle. I eventually can't stand every job I've had. I've never stayed anywhere more than 4-5 years.