let him call all he wants...doesn't mean you always have to answer...and no just because you don't answer or always call back wont send him the wrong message...trust me...
my h moved out..wanted d..was in love with ow...I stopped calling him..stopped always answering the phone..did my own thing...and ta da! h is home and ow is moving away!!
live for you and dd...
don't get sucked back into his world until he's serious about it.