wver

On a qwerty keyboard, the E and the W being next to each other, you might accidentally type W instead of E and inversely. In this particular case, in the word "Wver" the W was mistyped instead of E, giving us the word "Ever". If you came rushing to the urban dictionary thinking it was internet slang, sorry to disappoint you but it's a probably just a typo, stop searching for hidden messages in your girlfriend's message.