my Fiancé just broke up with me, 3 years gone in 3hours

Erica
So my fiancé and I have been together for 3 years, our wedding was set for June 28 this year, we were going to be engaged for a year and a half, and we just bought a house together 4 months ago. I am 26 and he is 29. We surely have had our little arguments over stupid little stuff, but have been happy most of the time, but tonight he just walked out and came back and broke up with me. To give a background, his mom is mentally unstable (has been on and off of meds etc bipolar, poss schizophrenia) but was always kind to me and introduced me as her daughter to people, even though we weren't engaged yet. My fiancé has anxiety, and takes medicine for it. His mom kept asking us if we set a date, and I kept saying not yet(bc you have to go to a place and put down a deposit to set a date) After he proposed, one month later, her whole demeanor changed, I wanted to get married in 2019 (I thought a year and a half was a good amount of time for us to plan a wedding, find a house, etc). Well she wasn't happy that I didn't want to wait 2.5yrs to get married, so when we were talking about it, I teared up bc I was upset, no crazy crying or anything. The next day she told my fiancé and his Dad and sister that I had thrown a tantrum because I didn't get my way. And that I was bitter mean and angry since the ring went on my finger. She also told them that I had ruined mine and hers relationship, which doesn't make any sense bc I didn't do anything but shed a few tears which I wiped with my sleeve. Anyway, a lot of angry texts were sent back and forth from her, and I was nothing but nice to her. I killed her with kindness, and she didn't like it, she was trying to make me mad. 2 weeks later we "made up" which consisted of her running her mouth, and me not being able to talk at all. Since then, she has tried to create every possibly wedge between my fiancé and I to separate us. Things continued on, and we continued planning the wedding and eventually bought our house. While looking at houses, she wanted us to live somewhere else, but I didn't. So she told my fiancé I was being narrow minded, and not giving him a choice, which wasn't true. One day we saw this house and he told me he wanted to put a bid on it that night, I said ok! I really love it too! We moved in and it was tough on him bc his mom kept saying how hard it is to have him gone, etc etc. (he is almost 30yrs old). We continued wedding planning, just booked our DJ, cake, food tasting and I just bought our invitations in the last 2 months. So last night I was really sick, came home from work, went straight to bed and wanted to get up to do laundry, etc. but slept for 14hrs. I woke up and had plans with my friend to help her do Christmas stuff. So I didn't get to wash his clothes last night. He called me, told me I didn't wash them, and I told him, he could wash them, just like I showed him before, he said he didn't know how.( Even tho I showed him) and I told him he could call me and I'd walk him through it. He hung up on me before I could say more. I came home tonight and was still upset that he had hung up on me, and didn't ask how I was feeling since I was sick, and just took for granted how much I really do on a daily basis for him. So he asked me to come into the bedroom, I said I can't right now, I'm doing my duties. I kinda was standoffish and the next thing I knew he was gone out the door. I thought maybe he was getting something in his car, or maybe went to get something to eat. In 2hrs he was calling me saying he was coming with his dad to pick up his stuff and he was spending the night at his parents. I asked him why and he just said because. A second later his mom is calling me telling me how we fight all the time, and he is unhappy, and she knows something has been wrong for a long time, etc etc all this BS. I stood up to her, politely, and calmly and just told her the truth. She said goodbye and hung up with me. My fiancé got home and basically had no emotion on his face, no tears, nothing as he told me he didn't love me anymore, he couldn't give me what I wanted, we were 2 diff people, it was nothing I did, he is unhappy and had been for a while. Etc etc. all these lies that his mom has fed him, and unfortunately he has decided to believe. I tried to reason with him, tried to ask him questions, but he wouldn't explain, just kept saying I was young, I'd find someone better for me, saying that he wasn't doing what he should for me, etc etc. All these words coming from her mouth. I cried and cried and just still can't believe this is happening, and that he has no emotion shown to me about this. (He is a very emotional person when it comes to something like this). The first thing I ever told him when he came into the house was if he remembered what I told him a long time ago, I said I will never leave you unless you cheat on me or hurt me or our children. (We don't have kids yet) he said he did remember, but apparently he's not keeping this promise to me. Sorry this is so long.