Exactly what ya looking for, tho they are only in college the last couple of chapters. But I really recommand if you want something realistic & mesmerizing.
http://www.mangago.me/read-manga/a_shoulder_to_cry_on/?oNOm
I am too lazy to recommend links but here the the best lists and tags:
http://www.mangago.me/tag/College/
http://www.mangago.me/tag/School/
http://www.mangago.me/tag/school+life/
http://www.mangago.me/read-manga/nirameba_koi/ ( I just had to link it it's TOO GOOD)
http://www.mangago.me/home/mangalist/12737/
http://www.mangago.me/home/mangalist/8384/
http://www.mangago.me/read-manga/yoru_mo_hi_mo_akenai/
http://www.mangago.me/home/mangalist/530621/
http://www.mangago.me/home/mangalist/194107/
http://www.mangago.me/home/mangalist/609078/
http://www.mangago.me/home/mangalist/289203/
http://www.mangago.me/home/mangalist/646057/
http://www.mangago.me/home/mangalist/298665/
http://www.mangago.me/home/mangalist/735532/
BL (shounen ai or yaoi fine) with college age characters or around that age. Super romantic. Like what made your heart actually skip. Not really looking for pointless sappy fluff or overly sweet stories, just something where the romance feels very real