Our co-workers are usually who we spend the most time with. It only makes sense. We spend most of our days at work so the people we see the most would be the ones we work with.
That's why it is so important to get along with them. Who wants to spend most of their days with people they don't like?
It can be challenging at times especially if there is an age gap between you and your co-workers. However, I've learned that people can relate to everyone no matter what the age gap is in between the two.
Even if you are shy, make an honest attempt to get to know your co-workers. You don't need to be best friends with them. However, if there is some comradeship between you and them, the day will go by a lot quicker.