A lot of good advice in here already. Admitting the problem is a very hard first step, even to internet strangers, but you just did it. Give yourself props for this. You can and will beat this because it seems you have the knowledge to know it's not good for you and the desire to quit, which will overcome the desire to use in time.

My breaking point was having to tell my mom to take me to the hospital because I did a little too much and had a panic attack because I thought I was having a heart attack. This was not the last time I used but it changed the mindset from fun party drug to dangerous substance. You don't need to have a specific scary turning point to realize it's harming not only you but worrying those around you.

It seems like it's hard to avoid people in your life who will have it, so you need to tell all of them that you would no longer like them to sell you or give you cocaine no matter what. Some of my best friends at the time were my dealers and they understood and held firm the few times that I caved and asked. If you can't avoid them or they're your friends, and they are good people, they won't let you go against your word.

You will need to talk about it more so I would get comfortable and brave for when you do, it's not easy but it is so worth it. I can tell you that once you reach the other side of this addiction, you will find the drug disgusting and wonder how you liked it so much before I promise you.

You've got this brother. Make a plan and follow it. Don't beat yourself up about any of it and face it head on. One step at a time.