It's been eight years since you graduated and you're still friends? Damn, I graduated only three years ago and I cut contact with all my university friends. I don't speak to any of them anymore. They were a means to an end, now the end is done and I have no need of them anymore.
Just let it go. University friends aren't lifelong friends. They're friends of convenience. Once you're graduated there's no need to stay that close to them anymore.
I'll ask you something, how many of them would actually help you out? For example, how many would help you to move house. How many would help you fix your car or fix something around the house. How many would help you assemble something. How many would come help you if you were stranded somewhere?
Those are your real friends, people you can count on to help you when you really need somebody's help. If there are any in your group, keep them in your life. But the rest have served their purpose and it's time to let them go. For me, none of my university friends would help me like that, so I let all of them go.
University friends are like work friends. They're good to socialise with and have a few drinks with on a Friday evening at the end of the work week. But once you no longer work together, why would you continue to socialise with them?