Here's a list of all the ongoing relationships between members on Equestria Forever. If you'd like to be added to the list, simply state something like "Please add Y x Z" and I'll add it :) Also mention whether it is an actual serious relationship, a forum "ship", or just something for fun. So without further ado~
Relationships
Lyra x Bon Bon
Spikey Wikey x Celestia
Applejack x Chickadee
Candy Mane x Soarin'
Fluttershy (Sage Fire) x Rasweetie
Shining Armor x Cadance
NowhereMan x Electra
Johnny Cage X Remilia
Joystick x Fleetfoot
Gau X Busy-Beee
Bromance
Applejack x Rarity
Trib x Kaido (Yasha)
Applejack x Cadance
Laberoon x Galapagois
Mailbox_Bomber x Flutterlover
Soarin' x Braeburn (as long as we remember that Candy is miles higher than Braeburn in Soarin's eyes :P)
Shining Armor x Braeburn
Noi x Lotus
Flutterlover x Braeburn
Ships
Twist x Minty
kidutsu x Raindrops
Grimlock x Dashfire
Santiago x Noi
Alice Rosewood x Graeldelon
Dusk Ironhoof x Simplicity
Yoko x Kamina
Cloudchaser x Cadance
Whiskers x Deux
Rarity x Fluttershy
Zecora x Shadow Pony
Sweetie Bot x Evermore
Fleur de Lis x Fancypants
Air Mail x Ferrarity
Flam x Shining Armor
John x Flutterlilly
Noi x Babs Seed
For teh lulz
Brosus x anyone that will pay
Flam x any mare that loves a stallion with a mustache
Cole Macgrath x Pipsqueak
Octavia x everyone
Alex Mercer x Alex Mercer
Doughnut Joe x Jim Morrison
Jose x shaky cameras
Chuck Norris x Right hand
Big Macintosh x fleshlight
gando x chessboard
Berry x her bottle of wine
Celestia x her clone
Blossomforth x Applejack
Trixie x her mirror
Xalder x the shoutbox
Sweetie Belle x her PS3 controller
OldNoi :lie: x Soarin'
Sweetiecake x her computer
Coder x any mare that is fine with a huge nerd
Noteworthy x his Super Nintendo
Food x his sockpuppet
Everyone x Food
Comrade D x The People
Dinodigger97 X his hand
Noi x Everyone that likes to be hugged.
B9 x His own sexyness
Braeburn x Slowking's Riddle Thread
Hamlet x AYBfim
Forever alone
DJ PON-3
Slowking
Gummy
Randy
Prince Blueblood
Mighty-Pony
Dustin
Grassy Tale
Sweetiecake
Trib/Anubis
Nina
Tom
Mailbox_Bomber
Lamentation
Coinspinner
Pink Destroyer
Lotus
DJ Phantasia
Evilmissingno000
Ended
Grimlock x Dr. Flipster
Dr. Flipster x Mousse Moose
Twist x Minty
Chowdah x Candiland
Shimmer Mint x John
Octavia x Princess Luna
Cœur x Cynder
Ferrarity x Phantom Shroud
Cheerilee x Colgate
Justice x Babs Seed
Forest Plains X Sam Gideon
Sweetiecake x Pipsqueak
Thought Bubble x Victor Zaitsev
Octavia x Thought Bubble
Octavia x Sam Gideon
Justice X Bitterpie
Maraschino Cherry x Squee