Hard breakup?

Me and my fiancee have been dating steadily for one year and 10 months now.. and on our one year and ten month anniversary he finally told me that he no longer wanted to be with me but he still loves me.. He wont tell me why, and he doesnt talk to anyone about it. We were fighting alot two weeks before the final act, but its because the stress we both have went through. my parents are going through alot and that made me ancy compared to normal, and it made him the same way and we have been clashing since. I dont understand why he doesnt want to solve it, he just said that he doesnt.. that hes through.. but why?? what can I do or say to him that will make this better. I dont want this to happen, I love him with all my heart and more and I feel like im losing everything for no reason at all... help please!