Hi! Try these:
http://www.mangago.me/read-manga/oreshika_shiranai_karada/
http://www.mangago.me/read-manga/hatsukoi_encounter/?Ocog
http://www.mangago.me/read-manga/fukigen_na_kimi_to_kimagure_na_kiss/
http://www.mangago.me/read-manga/hetakuso_love_step/
http://www.mangago.me/read-manga/suki_de_gomen/
http://www.mangago.me/read-manga/koi_wo_suru_tsumori_wa_nakatta/?HUaE
http://www.mangago.me/read-manga/prescription_for_a_boy_who_wants_love/
http://www.mangago.me/read-manga/hearty/
http://www.mangago.me/read-manga/sick/
http://www.mangago.me/read-manga/golden_sparkle/
If you'd like to find more, here's a tag:
http://www.mangago.me/tag/playboy%20seme/
Hope you enjoy!
Thank u (づ￣ ³￣)づ
Can someone please suggest me a yaoi where seme is a playboy and uke is in love with seme but scared to confess(づ￣ ³￣)づ