Please help me!!! i dont no wat to do?

abt three weeks ago i broke up wit my boyfriend of nearly two years and, two days after we broke up i found out i was pregnant with his baby...wen i told him he was surprise but was goin to accept his responsiblities as a father but now he seems to have changed he hasnt rang me to ask me wen the scan is or how i am? and wen i try to ring him he wnt answer...and he hasnt told any of his family yet, should i jus accept that i am on my own , or do u tink he will change his mind....?