It feels like you just spend the day resting and eating. Which is pretty much what you do... BUT Thats a good thing. Thats what your body needs...
In all the magazines you always read about
Your body needs and wants food and rest.
So how to make the days pass? Make them more exciting/entertaining.
For weeks to months yes, you will have to just either be at home/hospital and rest. Not do anything active... and if you do go to school or work, then try keep your movement to a minimum while trying to gain weight and find some way to entertain yourself in a calm way when you are at home!
Here are my suggestions:
Sudoku (If you dont find this too frustrating!)
Find a new series to watch....(I reccommend one which has alot of seasons :))
If you are musical... do that or write songs/sing songs
Watch tutorials on Youtube... learn how to braid hair or make friendship bracelets or make rainbow cake :)
Find a favourite Youtube star and watch all their videos
Play sims or other games
Make a blog
Make a video
Sow your own clothes or bags
Watch day time TV :)
Have friends over for snacks/baking/tv watching/studying
Listen to music
Paint your nails
Take long showers or baths
Just some ideas to pass the time, if you have any other ideas comment so that others can know as well :)