I love his face at the end there. Definite Haozi vibes, the type of guy who naturally suffers a bit. Loved the part where she was rolling around in his bed... I'm glad he realized that since they are dating it doesn't count as her teasing him!
I feel like the people who criticize this story should realize that, although from his perspective she's teasing him puts him off balance, from her perspective, she's just outright flirting and just waiting for him to have the confidence to flirt back! While finding him cute, of course. But I do think that tue narration could stand to emphasize less his confusion, and instead depict him doing things like exchanging mutual smiles with her, to reassure readers and make it less likely that they will self-insert into his confusion.