I dont get men

I dont get men??

Can anyone help?

I've been chatting to this guy for ages and we both confessed how we like each other, think about each other and that was that. Past few days I have not heard from him at all, I write to him and he hardly writes back and if he does its like a closed ended sentence. I know its been three days but before that it was constant. I don't know if I am over reacting or if men just are not as needy, or is he over it or does it when it suits him?? Should I just let him write to me first and just get over it??