My bf has so much of ego!cant think of solving this problem..plz help!?

we r goin out for more than 4 years. we usually speak every night before goin to sleep. he always calls up between 12 to 12:30 am...last night it was nearly 1 am..and i was missing him badly. i thought maybe he fell asleep after such a tiring day. i avoided calling him up thinkin that he would wake up...and i didnt want him to. at aroung 12:25 i sent a sms to his sister asking her to see if her brother has already gone to sleep. she wasnt replying...and i was sure she was awake at that point of time. i waited for 5 mints and gave her a call. she received it...but hung up...and i heard she was laughing and talking to some1 els..i was so pissed with her as she could atleast tell me.. "im busy/ wateva..."... i called her once more but she disconnected the line. i sent her a text again...but she was least bothered to reply bak. my bf called up at around 12:50 am. i was so pissed with him...he could atleast tell me that he was busy talking bout business to his cousin...at least i wouldn't have disturbed his sister and miss him at the same time..he got angry with me as i called up his sister for asking bout him. as it is his sister pissed me off...and got more angry when he started shouting at me without even caring bout what his sister did. he says it was all my fault..but i didnt knw what mistake did i do...according to him he didnt want me to drag his sister in between us as he is elder the 1 and has some respect for his own in front of his sister. he was busy thinking bout what his sister might be thinking bout us ... or bout her elder brother. i'm not close to his sister...but at least didnt expect this behavior from her. when he was taking his sisters side without even understanding my feelings...i started shouting at him. even he got mad and we broke up. but i miss him. i doubt he might come bak again. he blocked me so that we cant even talk. he even told me "i think we should give time to our relationship..and get together later when i miss u.." it was him who always neglected me during fights... i could never be angry for so long. he's concered only bout himslf...but didnt think if i would miss him... wat should i do now? im feeling so lonely without him... i miss him... was it my fault?