I quit smoking 3 years ago, but remain addicted to nicotine from nicotine lozenges. You're right, it's really just about the nicotine, and swapping smoking for lozenges made that abundantly clear - no withdrawals or cravings or little zings, it was actually fairly easy. One of these days I'll quit the lozenges too, but I haven't felt motivated enough to do it yet, which is ironic since I've quit smoking cold-turkey before and I know it's not nearly as bad as quitting alcohol can be (and was for me). I guess part of me worries it'll stir up the reptile, so I just keep it fed with lozenges (that don't have the dire health consequences that smoking has). In hindsight I probably should have quit everything else when quit drinking, but I didn't and it is what it is.
You can do it!