You can always come back here Robbie. The requirements are just 1) possible tongue-lashing from those of us who didn't cave, and 2) answer the three questions about what happened, why it happened, and most importantly - WHAT is your plan to avoid it happening again (ie, what will you do differently next time that same situation happens).
PS - The nic bitch had a deep hold on ALL of us, not just you. I dipped for almost 30 years, starting at age 15. Your quit isn't harder than anybody else's, thats just another lie she's telling you. Yes quitting is hard, but its very much doable. Thousands of us do it everyday.
If you're gonna quit, then lets do it. Commit to it, every single day for that day.