1. http://www.mangago.zone/read-manga/itou_san_kuraka_sui/
2. http://www.mangago.zone/read-manga/hana_no_miyako_de/
both never got back together
I hope these might be what you're looking for.
http://www.mangago.zone/read-manga/nozomu_bekumonai/
http://www.mangago.zone/read-manga/kono_ore_ga_omae_nanka_suki_na_wakenai/
http://www.mangago.zone/read-manga/star_like_words/
http://www.mangago.zone/read-manga/romantic_joutou/
This one is still being scanlated though. So it hasn't reached there yet. It might gonna take a while. If you can read Japanese there are raw scans somewhere on the Internet. Highly recommended.
well, i do have a list but that kind of storyline does not happen that as often as the others but i have those heartbreak breakups with getting back together stories around the middle part of this list http://www.mangago.zone/home/mangalist/62481/?filter=&page=1
Hey guys, can anyone recommend me Yaoi that has breakup with their lover (except for Shingo and Kakami) you know scenes that will break your heart and make you feel mad but feel happy 'cause they got back together again. I'm okay with Yaoi that has broken up with their lover and never got back together again. Thanks!