http://www.mangago.me/read-manga/usotsuki_na_kimi_no_toriko/ - I really like this one. I think it's the best of Minase Masara.
http://www.mangago.me/read-manga/mukizu_ja_irarenee/
http://www.mangago.me/read-manga/suki_toiunoni_nazekashira/
(But its mostly with new guy)
Asou Kai's "I'm Serious in My Own Way": http://www.mangago.me/read-manga/yachin_hanbun_no_ibasho_desu/mf/v01/c004/ ... the prequel to "Sorenari ni Shinken Nandesu": http://www.mangago.me/read-manga/sorenari_ni_shinken_nandesu/
Is there any yaoi where the uke is being cheated and he doesn't get back together with the cheater seme? and finds someone else or even ends up alone? i can never read cheating mangas unless i know they don't end up with each other at all.