Don't know how to tell you this, but I think that means your boyfriend is actually a woman. I don't make the rules, sorry.
I joke. In all seriousness though, you can be straight and have a dynamic that's more typically seen in Yuri manga. My partner and I joke all the time that we're so straight it looped all the way back around to being gay again. We're technically "straight" too, but I'm asexual and nonbinary, while she's gay as the day is long. I can't tell you how many Yuri memes I've sent her with the caption "look, it us" because it's absolutely something one of us would have done.
My wife had to explain to me that a girl I went to college with was into me years after the fact. She stumbled across some pictures I had on Facebook that this girl had liked and commented on and asked me about her. At the time I didn't think anything of it but she was interacting with old posts from long before we'd even met at school.
My wife actually facepalmed when I told her this one story in particular. I was in the Commons on campus suffering from a pretty bad migraine. I'd been there for like an hour when she came in and sat next to me and asked me what was wrong. I told her and she sat next to me petting my head until she had to leave to go to her next class.