Good for you. This isn't OD material, though. Please check the guidelines and posting standards before making a new thread.
And just so you know, what the others said is right - for the most part, there isn't any drug where you're 'instantly' addicted. People always act shocked and then feel that they're somehow above reproach because they've taken something once or twice and aren't addicted... I strongly caution you against becoming too confident here, as this is a very illusory feeling. Crack is still extremely addicting in general, and addiction can steak up on a person before they know it (especially when overconfidence is involved.)