I don't know what to say - I am back and hit the wall

I haven't been on the last 2 months. Everything happened so fast. I got a job and then out of nowhere my N told me he was going to move in with me. His lease was up and of course I could use the financial help. Then 2 weeks later he proposed to me. Another huge shock because he has said so many things to lead me to believe neither of these things would ever happen. So he moved in and he proposed. The boys were excited but it was wrong to begin with. From the evening he proposed it felt off. He was favoring his son when we were all together and I spoke up. I told him we need to sensitive to both boys and the changes. He didn't hear me. He would also come home each and every evening and not speak to me. He would sit on the couch and watch tv or play with his iphone. I would ask him how his day was and he would always say he didn't want to talk about it. I felt more lonely with him in my home I guess you could say. I have been even more unhappy if that were even possible. I thought this is what I wanted.
Then I saw on his phone that he was a dating site called "zoosk" a few weeks ago. I asked him about it and he said it was old. But he never bothered to deactivate it did he. So then I went on last night to his computer and saw he had asked a lady to dinner that was on his PTO committee. I called him while he was at dinner with her and asked him what he was doing. He was very vague. I lied and told him my girlfriend sees him in a restaurant with another woman. So then he says she just stopped by to drop something off before their meeting. I couldn't take anymore. I told him he was a liar and there's no language or country that would say he's right in going to dinner with another woman. And if so innocent then why didn't he tell me. So he went out of control and screamed at me that nothing will ever make me happy and now he sees why my gay ex left me and he doesn't blame him. He said he doesn't love me and hates me and is leaving this Saturday.
SO today he has rented a uhaul and is not returning until Saturday to pick up all his items. He has already given me a list of things I have to do by Friday. One of which is get my cell phone on my on carrier/name. It's currently on his. I haven't responded or said a word. I know how this works. I won't beg him back or ask for his forgiveness when I've done nothing wrong. He said he hated my guts. No, he screamed that he hated my guts and didn't want to see me again. I'm making that happen.
I'm on a huge crying spree and can't control my emotions but I know it's the right thing to do. As much as this hurts, I know he isn't right in the head and isn't right for me. Just a bad day for day 1. Now that his items are in my house and he's lived here for a few months it will be hard to wipe him away. I hope by reading your messages again I can gain strength and not lose my job over this. I need to get strong fast and I'm scared. I'm scared of me and how I take things. I take things very hard. I don't know what to do with myself.