Anyone plz tell me what to do!!!

My heart is broken!!!!!!!! i just found out my bf is cheating on me!!! but i love him too much to let him go, he told me he still loves me but he also loves another girl!!! *ouch* it feels like he took my heart, tore it in tiny pieces, threw it on the floor and jumped on it!!!! I cut myself over and over again, each time deeper, i dunno what to do!!!!! can any1 plz help me, i dont wana lose the guy of my dreams!!! just help!!!!!!!!!!!!!!!!!!!!!!!