manga that has emotions like in those two:

[url]http://i6.mangapicgallery.com/r/newpiclink/kawaisa_amatte_nanika_ga_hyakubai/1/b15cd8e67b2c2ba586f60858a70ad906.jpeg[/url]
[url]http://i1.mangapicgallery.com/r/newpiclink/dou_imo_nara_nai/1/02ffdc74868cf2364bc0f96c12a7bd26.jpeg[/url]

You could try the Jealous Lover/s category + Yaoi genre. I don't quite remember right now any story like that (sorry, it's been so long since I read my yaoi mangas), but if I remember I'll edit the post.

you can also try the "Possessive Lover/s" tag and then check the yaoi or shounen-ai box depending on how smutty you want it. (btw some mangas are marked with both genres)

Fujoshis rule!

Just read it: Oshiete Katekyo. Maybe you are going to like it (possessive lover).

Also, you can check out the
'Yandere' [url]http://www.mangaupdates.com/series.html?category=Yandere&genre=Yaoi&perpage=50[/url]
and
'Male Yandere' tag [url]http://www.mangaupdates.com/series.html?category=Male%2Byandere&genre=Yaoi&perpage=50[/url]

I just figured, since all the titles above include this tag and at least the second image's (haven't read the first one) seme is a yandere (if I remember correctly).