IMO, I think you'll be fine with the dog. Most dogs don't 'get tired of their owners', provided they are truly a part of your life.
Owning a dog is a huge responsibility and plan on that for the next 10-12 years...he will impact every facet of your life. (vacations, dates, work schedule, etc.)
Bonding with the the dog and doing things together will be key.
I would think though, that having other people in the house and them not bonding/ interacting with the dog might be confusing to him. He will know it's his new home and might think you are ALL part of his new "pack".
(There are plenty of threads on here where dog owners have other family members that don't care for the dog and it causes problems...and, yes, the dog will probably think the roommates are its family members.)
Also, another consideration, sometimes dogs are drawn to and bond with one member of their pack more strongly...be prepared for that; it could happen.
And, if it happens to be the roommate - who doesn't want to be a part of the dog's life...that could cause other issues.
Not trying to discourage you...just hoping that you consider everything and be prepared for anything.