I do agree, sometimes it is difficult to chat within work hours because everyone is busy. And when you get older, you have commitments in family, and other plans, etc, getting even more difficult to make friends.

I try to hang out with my colleagues, because i want to make friends and I still have time for that.

But anyways, I felt that you can be a good friend! Felt bad for your colleagues missing the chance to make a good friend. (Sorry if that sounds odd because of my poor English)