hw to understand a boy?

hi i am priya.. am a love failure girl.... in this situation one guy proposed me, after thinking everything i said ok to that guy... bt nw the prblm is he is not talking regularly with me... he says that he is has so much of work in his office... shall i believe him? is this is love? pls xplain me am tottaly confused... is he is in love with me? will i get success in my love? will he marry me? plsssssssssssssssssssss help me..