Want to stop excessive youtubing

Hi psychforum,
I'm 21 years old, male.
I'm unhappy with the amount of time I spend online.
Of course talking about internet addiction on the internet is contradictive but I would really like to share my story with others because I think it will help me kick the habit.
I started playing videogames when I was only 5 years old. Got my computer when I was around 12. Didn't spend too much time on my computer until the age of 14. Youtube became a big deal and to this day I spend at least 2 hours a day watching videos. I watch educational videos, comedy, cartoon parodies and music videos.

Going to youtube became so natural to me. If someone for some reason sends me a message on my phone I sometimes click on the youtube app logo instead the message app logo after I unlock my phone. When I boot up my computer the first thing I do is open my favorite webbrowser, even if I didn't plan on going online. When I come home from university the first things that come to my mind are: "does my phone battery need charging? Where is my laptop? Where are my earphones? How much time to go online? What to do online?"
Staying offline gives me near withdrawal symptoms and when I'm finally online I can't stop.

As I got older my grades became less and less meaningful to me, I didn't take my social status among my classmates very seriously and I didn't have a real hobby as a kid. So to compensate my life that wasn't very rewarding I kind of used music(videos) as amplifier of my mood. I knew a lot of different songs that almost fit 100% to my situation. I passively expirience the full spectrum of emotions. After a while addiction set in.
Do I have fun online? Abolutely. Can I isolate myself to continue my way? Of course.
Yet something inside me tells me to stop. It's like a very faint plea. I feel like I'm missing out and my life goes down the drain. Other people my age are dating the other sex or pursue a dream. I don't want the life of an internet junky anymore

So... from now on no more youtube for me. No more internet. Except checking mails really quick, which is my duty.

Greetings.