I am married to my best friend and lover. We have been together 22 years. I don't feel like I need any other close friends.
We have about 5 or 6 couples we are friends with, and socialize with them a few times each year but we go weeks and sometimes months without talking with any of them.
I have made and lost dozens of close friends over the years. It always hurts to lose a good friend, whether it is because they moved away, or I moved, or we just grew apart. . .