He punched me because I refused to search for his keys

Good day house, please I need your advice and help. This has never happened to me before, I swear this is the first time it is going to happen to me. I know it sounds cliche but this is the first time he has put his hands on me in our 5 years plus together. Usually if we argue which isn't that often; he walks out or ignores me or one of us calms down and the situation can be addressed in a calm manner. But this time violence was the result of an argument over keys. My fiance came over to see me and parking around my house means by 8am we need to go move the car. When the alarm went off we debated about who's turn it was to move the car he got upset and said he was going to go home. He went into the bathroom to shower and I went to move the car because I knew the car might get towed before he was done in there. When I came back angry I threw the contents of my hands on the floor and the car keys fell under the bed. he got out the shower, got dressed and demanded for his keys. At first I ignored him but then he poured a cup of water on me. I got out of bed changed clothes stated to him I dropped it on the floor and he should look for it himself as the level of disrespect I felt over the water was too much. he barely looked before pulling and dragging me out of bed, when I got back in bed he pinned me down to the bed painfully and demanded for the keys. When that didn't work he began knocking stuff to the ground and taking clothes out of my wardrobe and bags and dumping them on the floor when I smacked his back as I tried to grab his jacket to stop him he swung round pushed me on the bed and punched me in the eye. I screamed of pain and he let go of me I was furious but I didn't retaliate. He physically looked remorseful and his anger was dialed down a great deal, instead he sat down and just verbally demanded his keys. I went outside the flat and when he followed I ran back in and locked the door. I looked under the bed retrieved the keys and opened the door after 30mins of leaving him outside. When he walked in I had been crying and he began to apologize and beg and trying to clean up; I gave him his keys and demanded he left. After 20mins of begging and trying to fix my broken bed he finally left and I just broke down and wept. He called me multiple time after but I haven't really taken his calls. I've heard stories of fiances beating their girls, does my situation constitute to real abuse??? Can I possibly forgive his actions?? What do I do?? The swelling on my eye just started to go down and I am scared that he would do worse when I marry him. Please what do I do?