My boyfriend (27M) did something that really crossed a line with me (28F). I'm at a loss for what to do

Last night, my boyfriend did something that really upset me.<br><br><br>Back in July 2023, I was taking a shower at home and my brother walked into the bathroom to use it. I don't know if he looked in or just saw me, but he saw me naked. I flipped out, screamed, and kicked him out. He said he was just using the bathroom, but that didn't justify it. I told my boyfriend what happened. He thought it was weird and immature but also said I shouldn't have flipped out that much.<br><br><br>Back to yesterday. I'm taking another shower, this time at my boyfriend's house. It's dark and I can't see perfectly out of one eye without my glasses so all I saw was the shower curtain open. My boyfriend is behind it taking a Dyson vacuum to suck up the water to help me dry faster. I freak out again and start hitting him with my loofa and ghetto blast my phone to scare him away. He doesn't seem to like this and is offended I would get mad at him. I reminded him of the story of my brother and how what he did was the same. He shrugged it off like it was no big deal and that's not what he was doing. I think this is just a case of him deciding to do something and to hell with my feelings because he thinks he can do whatever he wants to me. We didn't talk much after that and I went to bed feeling bad. When I woke up this morning he had already left for work but left me a note saying he hopes I can get over this and that he won't talk to me until I can be calm and rational again.<br><br>This really just makes me more mad. I think he might be in the wrong but I don't know what to do. I don't know how to confront him and I don't want to let him get away with treating me like this. But I also love him and I don't want this to cause a bigger issue than it has to be. What should I do? What even was he thinking doing that?