Make that call, gather all ye old buddies and share meals and laughs and sorrows with them again. You will appreciate your new friendships even more when you see you can keep friendships for almost all your life. Feel blessed, and rightly so!
As they know you for a long time, they might give deeper observations about all these things. Interestingly, if you flip the situation by talking of older experiences to new friends, you are likely to get fresh perspectives to them. Keep them all in the loop.