Thanks Victoria for a fun & honest piece. My take after the first read is that as soon as you actively resumed your online browsing, for a “bigger, better deal”, you cannot call Rex your boyfriend, certainly not on exclusive basis, so the title may be a bit misleading. Beyond that, he may be online for any number of reasons as you state. Some continue a passive online presence, for the voyeuristic aspect of viewing strangers' profiles, or for the thrill of an unexpected 'like’. Given his track record (of having found at least one real relationship online), he is most likely actively back in the game, and you should come to terms with that. Talk to him rather than speculate. Cheers.