A to Z friend
A friend who’s not officially single or taken, but still treats you like you’re the only one in the world. They mean everything to you, even if they don’t technically count as your girlfriend.
My friend is not single or taken, but she still acts like my girlfriend. She’s my A to Z friend.
He’s not my boyfriend, but he still means everything to me. He’s my A to Z.
My A to Z is not officially my girlfriend, but she still acts like it.