What do I have to do with Lilly, because after feeding shes telling me to do Something about her craving but I dont know what to do
Date Beth until you get a 'fourth option' and then select it to continue feeding Lilly. To find Beth, 'Go for a Walk' -> 'Go to Park' -> 'Use the running path' after you encounter Beth enough times she'll give you her number, you have to date Beth somewhere between 4-8 times before you can get the fourth option.