Should i make more effort?

my ex boyfriend dumped me n then wanted me bak but told me to make mor effort so i tryed to ring n call him bu wen i do he jus puts me on bizzi or dusnt answer n then i get a messgae sayin ring now if u want but hes deleated me off msn n bebo and has called me a head a **** n **** n a ***** n always tells me to **** off i love him but i dont no wat to do shud i lower myself and look desperate or shud i jus let him go :(?