These are a few of my favorite yaoi manga :)

This is sequel of PBB, but you don't need to read that (I read it and don't like it )

Here start to read it http://www.mangago.me/read-manga/punch_up/me/En/Punch+Up/1/

This mangaka has beautiful art and her stories are the best!!

Just click the link and forget everything!
http://www.mangago.me/read-manga/saezuru_tori_wa_habatakanai/mf/v01/c001/

Again Yoneda Kou

It was my first yaoi manga that i read so it has a special place for me..

http://www.mangago.me/read-manga/sorenari_ni_shinken_nandesu/an/sorenari-ni-shinken-nandesu-chapter-1.html

I believe if you've not just started to read yaoi you'll know it :):)