Well, what I think is that maybe a small part of her always loved him, but after they kissed she realized she may have liked him, and then recently when Brad came, she then realized she loved him. xD

I think after they first kiss is when she started to feel something and then as the years goes by she started to fall in love with him.

something tells me she alwayed had a crsh on him ... i thought this even before the kissed - but i think your right something went off in Sams head after Freddie kiss - its was like her heart skiped a beat .... An i was thinking that mayde she felt like Brad was in her way 2 with Freddie Cause there always handing out - so she maybe thought if she was nice that Freddie will let her help them .

But i cant wait to see wasnt gonna happpen in the next eps - like will Carly tell anyone what she saw - an how are Sam & Freddie be with each other - cause know Freddie knows that Sams in love with him - an know Sam knows he knows !!! - An will anyone tell Carly

I think she always felt that way. :)

I think she always loved him. :) <3