We spent four amazing days together on holiday and everything felt intense and mutual. Now he completely ignores my messages on Tinder and WhatsApp, but keeps posting gym updates on Instagram like nothing happened. I feel so foolish. Did I just imagine the whole connection?

You didn't imagine those four days, but you are now seeing who he is once the vacation bubble pops. Ghosting while staying visibly active online isn't an oversight—it is a deliberate, cowardly exit to avoid a two-minute awkward conversation. Holiday romances fast-track intimacy because everyday stress, real-world context, and future expectations are temporarily suspended. For you, the bond was real and meant to continue. For him, it was likely an isolated summer chapter that he lacked the character to close with basic decency. Watching his carefree stories stings because it proves he has time for his phone, just no respect for your time. Don't double-text, and resist the urge to send an angry essay. If you need closure, send one clean line: "A quick heads-up would have been decent, but silence is an answer too. Take care." Then unfollow or mute him immediately so you stop tracking his routine. You dared to lean in and feel something genuine on a trip; that's vulnerability, not something to feel embarrassed about.