Logan Paul is going through a serious breakup at the moment ... but it has nothing to do with his fiancée, Nina Agdal -- the WWE Superstar's beat up over losing his United States Championship to LA Knight.
The Maverick shared a goodbye montage to his beloved hardware on Monday ... showing him enjoying his 279 days as the title holder before Knight handled business and took it from him at SummerSlam over the weekend.
View this post on Instagram
The video -- set to Charlie Puth and Wiz Khalifa's "See You Again" -- shows Paul's favorite moments with the championship .