Hello,
I think what your friend means is that your coursework is not valid for grad school admission after 5 years. I graduated with my bachelor's in speech a while ago and did a career change in a different area, then decided to go back to speech. By the time I applied for grad school, it was 5 years post-bacc. When I went to info sessions at different NY grad programs, they told me that I would need to retake my speech coursework needed for prerequisites as they were no longer valid after 5 years, so that's what I did. I retook the courses that those programs required and essentially took a big chunk of my undergrad speech courses again. Your bachelor's degree remains intact and valid, but your coursework is no longer considered admissible for grad school. I didn't know this when I was younger and I wish somebody told me that my classes can "expire." Hope this helps clarify things and helps you guide your decisions!