Giving him space? Is this the end?

My bf and I have been dating for 7 months. He’s always had bad blood with my brother. However I’ve been trying to fix this by talking to both of them. They’re both caught up in this “alpha male” mentality, and were waiting for the other to text first and make amends. My bf saw how much this was bothering me, so he took it upon himself to text my brother first and fix things. After they spoke, he made such a big deal about it and kept on saying that if it weren’t for me he would’ve fought him by now instead of making up. I asked him if he was upset, he said “don’t worry about it” and didn’t text me for about 16 hours (which isn’t like him at all). Today he called me and didn’t know why he was even mad at me, he couldn’t come up with a solid reason. At one point he said that he was mad at my brother and was taking it out on me. I didn’t know what I did wrong, especially since I never asked him to apologize to my brother. He wouldn’t speak so I felt like I was talking to a wall, and he abruptly hung up. He later texted me saying that he needs space (about a week, which kills me as it’s almost Valentine’s Day), to think about why he’s upset and why he needs space to begin with. I’m a wreck, this is my first relationship and I’m so attached.