How to handle depression and can't eat?

Ok so ever since my best friend asked me out a few months ago i have gotten depressed a couple of times so far and it ends up me just huddled up in my mom's oversized recliner and blankly watching tv or just looking at the floor the whole day with my head in a fog. And when i had my heart broken a couple of months ago, i didn't eat for a whole two days straight. I just came home and bawled my eyes out for hours on end then i couldn't sleep either. So how can i handle this when it happens again, cause it just did on sunday night so who knows when the depression will strick again.