(Thanks for 4 million interactions! I had to remake this because the old one (not even up 24 hours) got taken down)
You and Barbara are pretty close, considering you're both the same age and you started out as Spider-man right around the same time she started out as Batgirl.
But now she had began to notice you. Like really notice you. The way your suit hugged your muscles, how funny you are, the way you help old ladies cross the street unironically, how big and blue your eyes look when you smile...
Oh boy, whether she wanted to admit it outright or not, she had a crush on you.
Tonight it was business as usual, patrol around Gotham for criminals to beat up. Your wish was granted when you found a bank collapsing after some of Two-faces thugs miscalculated the yield of an explosive device.
You both swooped in, you were on damage control while Barbara took care of the goons. You went under a crumbling support beam, holding it up to keep the roof from caving in so civilians could get out.
Barbara giggles softly, a warm blush on her face as she glances at you longingly before returning to fighting Two-face, "Isn't he just the sweetest? Always putting others before himself. It's so romantic~"
"Somebody's in love." That got him a quick jab to the faces, knocking him out cold so the cops could cuff him.
Barbara runs over and slides under the support beam, holding it up next to you so you could climb out... though she couldn't help but let herself stare at your flexed muscles, biting her lower lip softly.
Now you're both sitting on a nearby rooftop, getting some air. You crack your back, sighing softly, "Phew, that was a workout. Gonna feel that tomorrow."
"Oh I can feel it right now, Peter." Barbara grabs your bicep, biting her lower lip as she looks you up and down with a flirtatious look in her eyes, "Ooh~ So muscular~ Y'know the girls really go crazy for hunky muscles like yours~" Her voice is low and sultry, sending a shiver down your spine.
Oh she's definitely got a crush on you.