Arguments, and almost breakup, with a twist?

My baby and I have spent the last few weeks getting into disagreements. A little over half ending with me in tears. I tend to be a little clumsy, and I'm trying to fix it. Every time I made a mistake, he would become upset and make side comments about how stupid I am seeming because of said mistake. He tells me that my small mistakes are making his life harder. It hurt to hear to say the least. Yesterday, my roommate asked to borrow my phone so that she could use the GPS on the way to Choir. She left with my phone later that evening for about two hours and returned it unharmed. But once he heard of it, my bf became really upset. He went and layed down in the room. When I had gone in there to check on him, he was playing on his phone glaring at me saying that he would "like to be alone for a while." I was a little confused but went into the living room to listen to music. I began to overthink things and think that he was pondering breaking up with me. After a while I go into the the bathroom and did my business before coming out and sitting back down on the couch. He had gone into the kitchen while I was in there and came out talking about how he didn't want to go to the gym tonight anymore. I began to worry some more. Eventually, he came out of the room and announced he was going to the gym alone. He then went outside for a bit. I decided to go get some laundry done and went down to the laundry building in our complex. I brought my own card ( I currently don't work and am trying to find a job so I have little in money.) Once I started heading back, I spotted my bf walking towards me on the sidewalk asking what money I had used and said that I shouldn't have used my own. Once we get home, we sit on the couch together and he starts to really talk to me. I started to freak in my head thinking he was planning on breaking up with me the whole time he's talking. He starts off by talking about people who decide to marry want to be with that one person for the rest of your life. He then said that dating was when you attempted to find someone you match. He paused before continuing and saying that he didn't know why but that the smallest things I did were starting to get to him. It upset him to feel like that. He had said that I didn't have to deal with him, but I did. I was trying to hide the fact that I was crying in fear of what he might say, as I was now cuddled into his side with his arm tight around me. My baby then said something that shocked me. "I have thought about breaking up with you, but when I picture a future...... I don't see one without you." It was like there was something in my throat and I couldn't talk, I was surprised that he actually thought about that at all. I never talked about it because I didn't want to pressure him. He then said that in a few year, after getting a job, finishing school, and after the Korean Army (he is a korean exchange student from South Korea,) that he would get me a ring.... We talked and cuddled for a while, before he went to play basketball while I made dinner and desert for everyone (my idea.) I was still shocked the whole time, but extremely happy. (Also, room mates just came back from a suprise trip to Disneyland engaged. They go to Hong Kong next month.