Why do people think Sakura is in love with Naruto and is there any proof?

Well, in Shippuden episode 1, Sakura looks at him in a way we've never seen b4. She blushes, but if your looking for alot of proof, then... you have a problem. Truth is, there's very little proof of Sakura being in love with Naruto.

2. Well, in my opinion, it's possible as she's the main heroine and he's the hero. however i think she has liked him at some point but she'll never forget about sasuke. because she admited that she still loved him. i think she considers naruto as a friend and comrade. however i really like couples with sakura so my wish is that she ends up with noone!