EX has ruined everything?

ive been seein this guy for a year, i met him 2 months after he split frm his ex, n i split frm my ex 5 months b4 and have a 4yr old child. when my ex found out i was seeing sumone else i think it hit him that is is forever over. i didnt love him for a long time and things got bad so left. i now rent my house and its really nice where i live, my ex turnt up once or twice being abusive. the guy ive been wiv a year dropped me of at my mums 1 morning n my ex was outside dropping my sons stuff off, he see me n my bloke kiss n opened hes van door n was gonna hit him, so i grabbed him n told him 2 f**k off and not 2 do it again, a few weeks ago my bloke see my ex sittin outside my house as he drove by, but ex was dropping sum school stuff of n i didnt see da ex, i sent my child out 2 get it.. sun nite my bloke said he was gona com over but didnt txt me after n didnt show up, my ex has been telin plp that he grabbed my bloke n that he was scared, my bf said hes had enough, wot do i do,?