Sometimes I feel tired of my iPhone?

I have a 5S that I just got this year. I don't have any plans of changing any time soon. What keeps people happy with their phone that they busy themselves with it? What can I do to maximize my use? Am I missing a game or an app because I'd really like to enjoy as well. I'm just a teenage girl but I don't know any app that helps. I'm not really in to Snapchat and the like. Please suggest!

Added (1). Since not much people talk to me, I'd like some rad useful apps that can help me learn or something for he future. I only have this game called aa.

Games on the App Store
Angry Birds (many different Angry Birds games)
Sonic the HedgeHog
Sonic the HedgeHog 2
Sonic CD
Sonic the HedgeHog 4 Episode I
Sonic the HedgeHog 4 Episode II
JetPack Joyride
30SecondLife
The Sims Freeplay
Many more games on the App Store!

Get Apple TV setting up AirPlay or Lightning-to-HDMI to get big screen, after Android I find my friend's 5S pitifully crampped screen. There's a study on screen size and Steve Jobs was infamously incorrect with his own stance on that. Besides gaming I don't see much use with such screen.

Use some photo apps and games.

Have you considered jailbreaking? It makes your phone a whole lot more interesting with all the customization features.

Switch your phone off and do something else.