u/Double-Papaya-44

For months I’ve been eating 3000+ calories and trying so hard, but I still barely gain even 1kg. I can’t keep up that amount of eating long term, i just don’t have the drive for it. And whenever I’m tired or sick, I lose weight so quickly because I completely lose my appetite. It honestly sucks. How do i increase my appetite to eat for and beable to keep eating alot without going back to my old ways?