So my fiance cheated?

my fiance cheated for the past six months, he took the ***** to my parents house and ****** her there and then he took her to the park behind our house at three o clock in the morning and ****** her while i slept. she kept bugging and coming around and i felt like she was a nut and just couldnt get over him but come to find she has only came around cuz he kept leadin her on for soo long. we have been together for a yr so for a little he was faithful but since july he has cheated. i love him still though. and wanna be with him how do i get over him doing this, can i ever trust him again, does he love me, why would he do this? please i need answeres i just wanna die now.