Red-flaggy

It's the kind of glow that doesn't feel strange or weird or misguided or red-flaggy. Just a glow. Yes, I'm still nervous as hell, but I know I'm moving in the right direction, no matter what happens.

Source: wiktionary

If you never show up at her house and are always dragging her to yours, they probably are pretty suspicious of you. Nothing is more red-flaggy than someone who doesn’t make an effort to get to know their partner’s friends.

Source: wiktionary

You get so swept up by charm and great conversation that you might literally ignore their "maybe-sorta-girlfriend" or the fact that they say stuff like "I'm not really into relationships." It's like they can utter the most red-flaggy, run-for-the-hills sentence straight to your face, but as long as they're funny and cute, it'll filter out into "I'm The One."

Source: wiktionary