Please help?

ok well i broke up with the love of my life cuz shes such a lier i just couldnt take it no more and she asked me to go out again but i said no cuz i have a bf now but i just dont like him in that way but i couldnt break his heart cuz we are really good frendz and i just started going out with him so how do i get over her like just forget that i loved her