I'm so happy for you to be kicking this nasty habit early in life, and you see that just quitting is only half the job.
The other half is building a rich, fulfilling, sober life.
Sounds like you're doing the right things. Do you have hobbies/interests? I lost mine because drinking starved them out. No time for them, 'ya know. A great nondrinking hobby is ballroom, Latin, or swing dance. It's very active, very social, and takes a ton of coordination so it doesn't really mix with booze.
How about joining a group or club? You mention not wanting to attend a group like AA. I get that. How about joining a group where the focus isn't about drinking/recovery, but their interests would just naturally preclude alcohol? Like a Cross Fit club, or a peak performance club, or getting involved with a church?
Keep going with what you're doing! You've got this!