I still don't think Yuma is in love with Sakura at all, he saw a pretty face and wanted it for himself, seeing Shinobu and Fumi "together" was probably the silver bullet he never knew he could get.
We have some red flags in these last few chapters, previously he was shown as being "nice" when he helped Sakura but when he got the chance, he took advantage of her in an emotional state and fucked her, Sakura is submissive as all hell but she did tell Yuma "no" but he still went for it.
Then there's that meeting with Shinobu, again, it seems like he's being "nice" and setting all the cards on the table for Shinobu so he can just let Sakura go and he can make her happy but I don't trust it at all, I'm convinced in one of these next few chapters if not the very next one, we're going to see his true colours.
Something someone else mentioned in a previous thread, after he was done having sex with Sakura, he didn't cuddle up to her, he sat on the edge of the bed drinking water, that doesn't scream romantic, that looks more like someone finished with a sex toy.