I can tell you the typical repeating timeline:
1st week: I like you/I like you too.
2nd week: Damn you kiss good/so do you.
3rd week: I think we should fuck/let's do.
4th week: I think I love you/I think I love you too.
5th week: I've never seen you act like this before/me neither.
6th week: You're an asshole...good bye!/good riddance bitch!
Now, when you find someone who breaks this progression, you just might have a keeper!
BD