Developments

Before meeting Ino (epi 32 - flashback with Ino)
Sakura used to be teased about her big forehead when she was around 5 years old. She always tried to cover it with her bangs.

After meeting Ino (epi 32 and 38)
Ino gives Sakura the courage to show her forehead and not to cover it. Sakura started to make friends after she made friends with Ino. Ino told her that Sakura is just a bud which would eventually blooms and might be even prettier than her.

After she announced her crush on Sasuke (epi 32)
Sakura declared that Ino and her are rivals. At this point of time, she had matured as she did not depend on Ino anymore.

After she was put into the same team 7 (epi 3)
Sakura returned Ino the ribbon she gave her and announced that they were equal shinobi from then on. Sakura has a perfect chakra control and was proud of that. She tried to show it off to Sasuke but Sasuke did not take notice of it (or not?) Sakura was rather arrogant and a show off. She was mean towards Naruto (at the beginning) and only cares about Sasuke. She was weak and was always protected by Sasuke and Naruto.

During their B rank mission
Sakura tried her best to protect their client but was too weak to do that. Thus, her teammates always came to her rescue.

During the chuunin 2nd exam (part 1) (epi 29)
During the fight with Orochimaru, Sakura encouraged Sasuke into gaining back his fighting spirit. Sakura started to gain respect for Naruto and admitted that Naruto IS strong.

During the chuunin 2nd exam (part 2) (epi 32,33)
Sakura finally bloomed. Instead of being protected by Sasuke, Naruto and Lee, she tried her best to protect them. However, she was wtill weak and was unable to defeat her opponents. Later on, she cut her hair despite how she liked having long hair. From then onwards, she was determined to get stronger.

During her match with Ino (epi 38)
Sakura delared that the match is not about love, but as equal shinobi. Ino admitted that Sakura had bloomed, and had bloomed into a very beautiful flower.

During Naruto's match with Kiba
Sakura encouraged Naruto and cheered for him. This shows the friendship gained after a period of time.

During the fight with Gaara (epi 76)
Sakura saved Sasuke by blocking an attack for him. She would have died of suffocation if not for Naruto.

When Naruto left for training with Jiraiya (epi )
Sakura was asked to send some food to Ino. She thought of Sasuke and Naruto on her way there. Now at least we see that Sakura had recognised Naruto and cared for him.

When Sasuke is hospitalised (epi )
Sakura visited him everyday and brought him flowers, shows how caring she was for Sasuke. Even Tsunade recognised her love for Sasuke.

During the mission at Tea Country (only happens in anime)
Sakura tried her best to protect the client and not depending on both Sasuke and Naruto, even at the cost of an injury. At one part on the mission, she even saved Sasuke from falling into a valley.

In the hospital (epi )
Sakura was concerned over Sasuke and came over to visit him. She bought him food but apparently he was too preoccupied in his revenge. He kind of vent his anger at Sakura.

In the hospital (part 2) (epi 32,33)
When Sasuke and Naruto almost killed each other, Sakura ran forward and tried to stop her. She would have been killed by them if not for Kakashi.

When Sakura expressed her concern over Sasuke (epi 106)
Sakura confided in Naruto her concerns about Sasuke. This shows their friendship has grown deeper.

When Sasuke left (epi 109)
An episode not to be missed for sasusaku fans. Sakura declared her love for Sasuke and promised that she would do anything for him. Sasuke said "thank you" to her. Sasuke finally recognised all that she had done for him.

When Sasuke left (part 2) (epi 110)
It seems that Naruto realised that Sakura loved Sasuke and will never return his love for her.

When Kakashi went to chase after Sasuke (epi 131)
Sakura tagged along behind Kakashi. She seemed to seek comfort from him. Kakashi had no idea on how to make her less worried.

After Naruto returned (epi 134)
Sakura tried to hide her grief and did not blame Naruto at all. In the manga, she asked Tsunade to train her. However, in the anime, Sakura was determined to get Sasuke back herself.

After the mission in Rice country (epi ???)
Sakura, determined to get stronger, asked Tsunade to train her.

When Naruto 2nd season started
Sakura had became very strong and received Kakashi's compliment. Her taijutsu is very strong, just like Tsunade.