He is 21...You are way younger than him...This is a crsuh which sometimes turn into obsession... And remember ur 14 yet...u have a long life still...and he is not the only guy that you will fall for...I am sure there is a guy for u but not now, later when ur older and wiser.
For now, you have to get over him. the only way u can get over him is to avoid him. Dont mail him, dont think abt him. get ur mind in some other activties...
Take Care
~Mona 😛