BlackWolf, I try real hard to give advice within the boundaries of what someone will listen to and/or actually do. I won't tell someone to go to the emergency room for "depression" and problems with an eating disorder if they won't go. I will scream it if they are thinking of hurting themselves or others.
I won't say you should try to get more medication if that's not what you want. People do need to know that meds change you in good and bad ways. You seem to know that and don't like more meds. Okay.
So, you can go to the meetings and put in some bogus token "service" or you can leave at 18. Leaving at 18 is not as terrible as it sounds. It would be an excellent time to reach out to some college and have them help you find the counseling you need while you also figure out future short-term and long-term goals about where to live, work, and further your education.
It would help if there are any non-JW relatives willing to let you crash at their home until you find a way, but not impossible for you if that's not the case.
Before this time, you need to get a grip on that depression and stay busy. You need to work, exercise. Just think how ready you can be. No matter what, you can be ready for the opposite sex if you exercise.
The road is rough, but not impossible. You can do it. Sure, you will have money problems for years, but so many of us have them anyway. You will find your way.