Was Tomoyo in love with Sakura? While I was browsing for different anime in different genre, I came across with Yuri genre and then found a list where anime that contain yuri genre. I was shocked to see Cardcaptor Sakura on the list as anime with yuri as an additional element. I have watched Cardcaptor Sakura a lot of times but I haven't read it's manga. The only thing that comes on mind that could be the yuri element was Sakura and Tomoyo's relationship as best friends (and their mothers'). If I'm not mistaken, since I've watched Cardcaptor Sakura a lot of times when I was still a kid, there were no solid implications that Tomoyo had romantic feelings towards Sakura, meaning you can only sense friendship in their relationship (or it was something I overlooked or I didn't give deep meaning to it). Though, I'm not really sure in the manga since I've never read it. So, is there any truth to this and if it has (in anime or manga), please show reference to justify it (in any episode or chapter).
On the TV Tropes page, Tomoyo is listed as a Token Yuri Girl:


  Tomoyo Daidouji in Card Captor Sakura, though it was toned down a bit in the anime. The manga actually had her telling Sakura that she loves her in that way, though it went right over the heroine's head. 


So it seems that it's toned down in the anime (I didn't seem like anything other than best friends and maybe borderline infatuation in the anime), but blatant in the manga. Also noted in the CSS wiki:


  While Tomoyo is in love with Sakura, she notes that she is happy to be able to be with Sakura and does not require Sakura to love her back. 


According to this blog post (contains lots of other instances), it happened in Volume 2, Chapter 2: