I dont know what to do...?

okay so my ex boyfriend and i broke up in october and now he wants to get back together with me and i want to because i really love him.... well we made plans for sunday on tuesday and now im trying to contact him but he doesnt answer any of my text messages or IMs on AIM..... this happened before too though.. when we first went out.... he said the reason he broke up with me was because he got really nervous around me and he didnt know what to do..... so i dont know whats going on.... should i try calling him or should i not even bother?