I am not sure where in Netherlands you are but if you want to know what to do here it is –

1) Google this “CLOSEST CROSS FIT TO ME” . Join and work out. Why cross fit you ask? This is one form of exercise that makes you not just physically strong but it kicks your mental ass. I say this with experience. Once you start cross fit your hunger strike will be over that I can promise you for sure.

2) Join a book club , go to parties with friends and mingle you do not have to hook up or look for a BF just talk to another human being you age and see what is new in the world.

3) BLOCK and DELETE his number/contact from all social media and do not ask about him with common friends or stalk him on FB.

4) Like you said you are too young I PROMISE YOU THIS you will love again and you will have your heart broke several more times but U WILL Survive. Its called Life.

So Fake a Smile if you have to but go out and face it.