Confused, it may be 'bad practice' to tell real life non-FL people about your reality BUT that is only from FL's perspective. You only need to keep up the 'amazing successful business opportunity' for as long as you want to recruit people. As soon as you don't want to recruit anymore, you can say what you want to anyone you want.
You don't need to do a big flouncy 'I'm leaving FL' post on FB. Just quietly withdraw from that, or continue retailing if you have customers. But you can confide in real friends. It may be hard at first to admit how you've been conned into doing what you've been doing, but just imagine when it's all over. You don't have to worry about uplines or what they think.
It is SO SO WRONG that you are left in this position of uncertainty, embarrassment, and being concerned about uplines. It is what keeps people going for longer than they ought. It makes me angry on your behalf. I hope you find an alternative soon.
I know if you were my friend who joined FL 2 years ago and has withdrawn her friendship from me, and you called me now, I would be round in a shot with support and hugs and maybe even a bottle of wine.