Tomoyo and Sakura
Again... for those of you only familiar with the Cardcaptor series (American dubbed) you will be thinking ..... what!?  But yes, Tomoyo loves Sakura.  Its extremely subtle but it is noticeable.  However unlike most romances in the series, where the person in love trys to tell the person they love, Tomoyo shows her love for Sakura by making sure Sakura is happy, even if it means Sakura isn't in love with her.  But like i said tomoyo is not very obvious about this.  There are way too many little blurbs to mention, but for me the most important sign was in episode 66.  Sakura is sitting on the swings with Syaoran telling him about her confession to Yukito then she said that Tomoyo told her that as long as the person you love is happy than you can be happy too.  In an earlier episode Tomoyo said to Sakura "I'm hapy as long as your happy"  and she said something along the same lines to Meling when she comes and finds out she is no longer engaged to Syaoran.  There are way more little instances like that .  But apparently from what i have been researching tomoyo's love is more apparent in the manga than in the anime.