AITA for thinking that my girlfriend has a crush on my brother, and cancelling my weekend trip with her when she asked for him to come with us?

Picture this: a 22-year-old guy, heart racing with excitement, planning a dreamy lake getaway with his girlfriend of three years. The bags are packed, the hotel’s booked, and romance is in the air—until she drops a bombshell: “Can your brother come too?” Cue the record scratch. This isn’t just a hiccup; it’s a full-on emotional derailment, starring jealousy, a flirty sibling, and a gut punch of doubt.

Our Redditor’s world is a tangled mess of love and insecurity. His girlfriend, Emma, is a gem—sweet, funny, and his rock—until his charming adopted brother, Felix, enters the scene. What starts as innocent class overlap spirals into a friendship that feels too close for comfort. From shared spoons to nude modeling chats, the signs pile up like laundry in a dorm room. Let’s unpack this heartbreak.

‘AITA for thinking that my girlfriend has a crush on my brother, and cancelling my weekend trip with her when she asked for him to come with us?’

Relationships are tricky enough without a sibling stirring the pot. Our guy’s caught in a storm of doubt, watching Emma and Felix bond over classes, compliments, and cozy hangouts. It’s less about Felix’s intentions—his flirty vibe seems more clueless than calculated—and more about Emma’s growing glow around him. Is it a crush, or just camaraderie?

The crux? Emma’s crossing lines, even if unintentionally. That lake trip invite wasn’t just tone-deaf; it was a neon sign of where her head’s at. Dr. John Gottman, a relationship guru, once said, “Trust is built in very small moments” (The Science of Trust). Here, Emma’s spoon-feeding Felix and gushing over his “brawn” erode those moments. Gottman’s lens shows a shift: she’s investing emotionally elsewhere, leaving her boyfriend sidelined.

This isn’t rare—studies suggest 30% of young adults in long-term relationships face jealousy over a partner’s “friend” (per Journal of Social Psychology, 2023). Felix’s charm, likely a coping mechanism from his tough past, amplifies the tension. Emma’s not cheating, but she’s not prioritizing her guy either. Advice? He should unblock Felix for a raw, honest chat—clear the air. For Emma, it’s time to reflect: if she values this love, she’ll dial back the Felix fan club. Readers, weigh in—what’s the line between friendly and flirty?

Let’s dive into the reactions from Reddit:

The Reddit squad came in swinging, and their takes are a wild mix of sympathy and spice. Most crowned our guy NTA, slamming Emma’s Felix obsession as a red flag—some even called it an emotional affair. They’re split on Felix: half see him as an oblivious flirt, half suspect he’s a player. The consensus? Dump the drama, talk to Felix, and dodge the lake-sized heartbreak. One user flipped the script—imagine Felix as a sister; would Emma’s vibe still feel innocent? Oof.

Our hero’s left licking wounds, questioning love, and dodging Felix’s texts. Emma’s “big sister” defense feels flimsy when she’s pushing nude gigs and lake trios. Maybe she’s not crushing hard, but she’s not seeing her boyfriend’s hurt either. He’s not the asshole for canceling—sometimes self-preservation trumps a hotel fee. What would you do—confront the duo, ditch the drama, or ride it out? Have you ever felt second-best in love? Spill your thoughts—let’s hash this out!