Is this kind of behavior excusable?

My boyfriend came to visit me at home for the first time yesterday. He had a cold so he was a little under the weather, and it may have contributed to a bad mood, but he was just extremely negative the entire time. He was generally unimpressed with everything we did/encountered: “Eh, I’ve seen better.” “Meh, I’ve had worse.” He wasn’t satisfied with anything. When my friends left, he tore a couple of them apart for about 10 minutes and wouldn’t shut up about it, even when we were making out. I was pretty offended. I didn’t feel comfortable taking off my shirt, because my mom wakes up in the night sometimes, and I was worried she’d come downstairs. A few minutes later, he asks me if I want to have sex (I’m a virgin, and he knows). I thought this was really insensitive and extremely poor timing; he just railed on my best friend, and I just told him how I’m paranoid about being walked in on. Why would this be a good time for us to have sex for the first time? I started crying because I was so overwhelmed by all the bad energy. He knew I was really worried about him having a bad time and reassured me that he was enjoying himself/liked hanging out with me… yet he kept complaining and being a jerk. He was just oblivious to how upset it made me. It’s like he’s not pleased with anything, he thinks out loud/says rude things, is oblivious to how hurtful he is. I am not ready to write him off yet, but these are bad signs. And he’s studying abroad in a month until November, and I’m no longer sure if I want to stay committed to him. I don’t know if it’s just a small annoyance I should deal with, or if it’s going to be a dominating personality flaw.