http://www.mangago.me/read-manga/end_love/bt/213972/Ch1 (this one doesn't really have a rejection more like a break up, and the guy later on does say he regrets it and even tries to get back with him)
http://www.mangago.me/read-manga/zantei_koibito/ (the last story in this one has a slightly similar story, seme rejects uke cruelly, but uke doesn't get together with anyone else just becomes really popular and seme regrets it)
Just started reading this one here:
http://www.mangago.me/read-manga/obaka_chan_koigatariki/
does anybody knows a manga where the uke (or the girl in case os shoujo) likes(LOVE) the guy but its cruelly rejected or he just doesnt care about him(her) and them later regrets when the uke(girl) is stolen away by another guy ???
appreciate help (▰˘◡˘▰)