We have all, at some point, watched a close friend vanish into the hurl-dorable vortex that is love. I know I have! And, of course, many of us have entered that vortex ourselves. One that may include (for instance) repairing one’s beloved’s only flaw — “You’ve never seen Buffy?!” — with an intensive marathon that also, necessarily, includes Angel. Then she/he is all, “You’ve never seen The Wire?!” and poof, you emerge months later into the sun, glassy-eyed, watching your back for vamps, and wondering where all your friends went.

Well, Buffy or no Buffy, the friend attrition that comes with love is definitely a thing, according to new research at Oxford University. In fact, they counted:

Oxford University researchers asked people about their inner core of friendships and how this number changed when romance entered the equation.

They found the core, which numbers about five people, dropped by two as a new lover came to dominate daily life.

“People who are in romantic relationships — instead of having the typical five [individuals] on average, they only have four in that circle,” explained Robin Dunbar, a professor of evolutionary anthropology at Oxford.

“And bearing in mind that one of those is the new person that’s come into your life, it means you’ve had to give up two others.”

But it doesn’t have to be this way, does it? On the one hand, you know, your friends don’t come on your honeymoon: even grudging single friends should allow their newly smitten compadres and compadrinas a grace period. It’s a thrilling, fizzy, heady time, and we need to give them that, just as we’d want them to “let” us have ours. On the other, folks, even if you find that special someone who “gives you everything” and “meets all your needs,” well, they don’t. They may be wonderful in every way — even a wonderful friend to you — but they’re not a full-on swap-in substitute for friend-friends. The bestest love relationships are those that enhance your lives and sense of connection to people and the world, and those in which you each have space and time to nurture your own, separate, friendships. So once you stop seeing those early-in-love stars, make sure you keep seeing your friends.