I think I'm addicted to the internet?

Looking back at my life, before I had a computer and smart phone I mostly played outside, I hung out with friends. I was much much more active. My parents got me a computer back in 07 and since than I have been addicted since. When I had school the first thing after getting home was to get on the computer or check my iPhone for the rest of the night. Now I'm done with HS and now it's like I feel like this internet addiction has taken over my life. I literally spend 9+ hours a day in front of the computer or on my iPhone. I tried parental controls to limit my on screen time, but I usually just turn it off after 10 minutes. I have very very bad self control. I will literally have 50+ tabs open at once on my internet browser. I've tried to get off the computer and just step away but its a lot harder than you'd think. It's like my whole life is dependent on the internet. I've tried to think of what I would be doing right now if I didn't have the internet, what kind of hobbies I would have If I didn't have the internet and I'm completely lost. I don't know what to do. I guess I could go outside, but I got nothing to do outside. Like I'm just lost without the internet. I feel like one of those people from Wall-E. It's so hard to just step away.

Added (1). Like I will tell myself to just get on the computer for 20 minutes or an 45 minutes but that usually turns into 5, 6, 7, 10 hours. I have a problem.

Added (2). It's almost like a drug. Whenever I tell myself I'm not going to get on the computer it's like my impulses kick in and I do it anyways. I have such bad self control. I feel awful!

Yes, this is the lamentable aspect of modern life.

Get parental control software on your computer.