I would say try your best to be their friends (remember they will have the same fears as you) and make sure you compromise on any disagreements. Or at the very least be calm during any conflicts.
Lots of the time, it’s not the problem that can friendship breakups, but how people react in them. If you immediately get defensive or aggressive when a problem arises, chances are you will quickly grow to hate each other. Stay calm, collected and diplomatic and you will be fine.
Even if your roommate is a b*tch, as long as you don’t come across as one, the other 4 people in your room will probably like you more.