Assalamualaikum.
You are not living in the jail, bro. You are a free young man, and there are many activities that you can do.
When I was young I was never getting bored because I always could find an activity like gathered with friends, went to book stores to read 'free books' and bought only a cheap book, rode bicycle that I borrow from my friend, visit exhibition event, traveling around the city with public transport car, visit park or traditional market places. Or, did in-house activities like clean up my room or help my friends to make or repair something. And many other activities, of course.
Now I spend my free time with my family, like visit recreational places, dine-out, shopping, etc. This noon I and my wife will go to wedding party, and then we will spend our time with our kids.
Time is always running, It goes and will never comeback. So, fill your time with activities. In the future, Insha Allah, you will have many beautiful memories.