Merill had an unrequited crush on Hawke, too, but she was much more subtle about it and seemed to have no problem at all being 'just friends.' I think that makes a lot of difference. If they want someone to love Quizzy no matter what, I hope its more like that then Liara or Anders.
Tali, too, has been holding a torch for DudeShep for two years. She admits to "watching" him and pining for him since they met in her romance, only she didn't know if he could see past her Quarian circumstances. I found that a bit iffy in how it played out.
I mean, if someone told me, "I have been watching you for years" and then recalls specific incidents in list form... I'd be more creeped out than flattered.