He would be a little embarrassed that he probably looks like someone who doesn't work for what he wants, since he wasn't able to get the first say. He would immediately confess his feelings right after his crush is done talking, and wish for the best.
The moment he gets a drift of what's going on, he would be a stuttering, nervous wreck that needs a tall glass of water. After taking a big breather, he would then be able to comfortably convey how he feels the same towards that person.
He would try to accept the confession with confidence, but he'd be totally speechless, and wouldn't be able to do anything but lick his lips and chuckle. He'd think of a clever and memorable way to tell his crush that he feels the same way, but he'd end up with the ever-cliche "I like you too".
He'd be so happy about this that he wouldn't be able to say anything else. He'll get sweatier than usual as he finds the right words to say to respond to it. Just when his crush is about to walk away because they think his silence signals rejection, he'd immediately stop them and mutter out a quick confession of his own.
Blurting out "me too!" wouldn't be ideal, but he'd be overjoyed and giddy to hear what he just heard, that he wouldn't be able to stop himself. He has been waiting for this moment, and although he wouldn't be able to believe what's happening, he'd just go with it and work out everything along the way.
It would be like a dream for him to be in that scenario, so he'd keep on asking if his crush is sure about what they feel. Once everything falls into place, he'll be able to then let his crush know about the feelings that he has towards them.
Just to mask his surprise, he'd jokingly say sweet words in hopes that his crush is joking as well. Once he realizes that the situation is a serious one, he'll immediately start blushing and stuttering. Fortunately, he'll be a little bit stable enough to stutter out how he feels.
For once, he wouldn't able to come back with something snarky or sharp. Instead, he'd quietly sit there as he listens to the love of his life confess mutual feelings for him. He wouldn't be the one who's verbally say that he feels the same or what, but instead, he'd show it by smiling softly and holding their hand.
He would probably just walk away, not because he's rejecting the person, but he'd just rather keep his nerves to himself lest he embarrasses himself. Once he's collected, he'll come running back to his crush, then explain what happened along with his hidden feelings.
For someone who doesn't really say much, he'd start asking a lot of questions, like "since when?", "why me?", or "am I being set up right now?". Just like anyone else, he wouldn't want to get hurt, so he'd make sure that his crush is honestly and fully sure of what they feel, then he'd be able to reciprocate the feelings.
Her tough exterior might melt away as she'd try to fan away the heat from her cheeks and spit out the words stuck in her mouth. She would mumble out how she has always felt the same way, then either run away or bury her face in her scarf.
She doesn't really believe in the words, since they would seem shallow or fake to her, even if she's flattered. Instead, she would insist on her crush showing their affection if they're really that determined to go after her. It would also be a test if it's really right to let them know that the feeling is mutual.
She would be super excited about this that she wouldn't stop herself from jumping and hugging her crush. She'd then animatedly ramble on about how she's been feeling the same way for quite a while now, and that she hopes that things would be perfect between them.
Once she gets over all the blushing and nervous laughs, she'll then quietly tell them about how the confession she received was the confession she's been waiting to tell her crush all along. For some reason, she'd be prepared with a little gift for her crush to commemorate the day they got together.
She may be a little afraid of the blissful moment being nothing but a joke, so she'd tell her crush to beat it and stop playing around. She wouldn't be able to stop thinking about it, however, so she'd apologize for the way she acted and come clean about her feelings as well.
She would be so flattered that she wouldn't be able to stop giggling. Her crush may think that she's making a joke out of the situation, but she'll immediately save herself and tell her crush that she's just taken aback by it. Despite her complaints that she didn't respond to it well, everything would surely work out.
Because she'd be really shy and giddy about it, she wouldn't be able to do anything else but cover her face and giggle. She would explain that she doesn't think of that as a joke, then proceed to tell her crush that she's just happy that the person she likes likes her back.
ITS THUNDERSTORMING AND I’M IN MY BASEMENT WHEN I HEAR MY PHONE’S VOICEMAIL PLAYING OVER AND OVER BUT NO ONE CALLED. THEN I LISTEN CLOSER FOR A MESSAGE AND I THINK I HEAR SOMEONE CALL MY DADS NAME. I GO UPSTAIRS LIKE THE DUMB WHITE PERSON THAT I AM AND LOOK AT THE PHONE. 2 MESSAGES, 0 CALLS. NOW THERE’S CREAKING UPSTAIRS AND