okay so here we go...this is haard...xD

1. Sex Scene/First I love you (Elena) 1x10
2. Stefan:"I love you so much." Elena:"I love you too" *huuuug* 1x18
3. 1x11 "You are the women I love
4. Daaaance scene 1x12 "Now you remember that, cause it's never gonna happen again"
5. Elena helps Stefan to choose life 1x20 " I don’t want to survive… after what I’ve done, I just want it to be over."

this list might change...xD After I see your entries I realize I forgot something lol...xD

okay, this will all be subject to change, haha♥
gosh, this is hard!

1; SE Sex Scene (Of Course!) + Elena's `i love you` ♥ (1x10)
2; `I Met A Girl, We Talked, It Was Epic..` SE First Kiss ♥ (1x02)
3; `I Don't Want To Survive After What I've done, I Just Want It To Be Over` Elena saves Stefan ♥ (1x20)
4; `Now You Remember That, Cos Its Never Gonna Happen Again` SE 1950`s Dance ♥ (1x12)
5; `You Are The Woman That I Love, I Love You` ♥ (1x11)

Here We Go!!

1.Stefan/Elena Sex Scene and I love you (Elena) (1x10)
2.Elena saves Stefan (1x20) "I Don't Want To Survive After What I've done, I Just Want It To Be Over" Elena saves Stefan
3."Now you remember that, cause it's never gonna happen again" Dance Scene (1x12)
4."I Met A Girl, We Talked, It Was Epic" Stelena's First Kiss (1x02)
5.Stefan:"I love you so much." Elena:"I love you too" (1x18)

Like Jov said, this list might also change!!