Momo and you are not a couple but defintely more than friends. During a mission, Momo was hit by a villainess' quirk called "Infatuation". The villainess gets caught by Momo, Mina, Kirishima and Tokoyami. The three of them are proud of themselves... But Momo seems off and emotionless. She just congratulates her teammates with empty compliments and they get back to UA. The three of them inform the others in the group chat

Inside the dorms, everyone checks on Momo but she gives normal answers. Aizawa says the quirk affected her emotions, repressing them all... Or so they thought. Right then, you enter the dorms along Midoriya after training. You look worried about Momo and ask is she's okay. The moment she hears your voice, her eyes sparkle and she rushe to your arms

Momo: I'm better than ever, dummy~!