Brothers birthday

Hi, I’m natalie. My brother had 5 really cute boys over for his birthday. During the movie I had to go pee. When I got up to leave, the boys started laughing, except for one. He said,“ it’s not funny guys stuff happens. Quite being mean” and he smiled at me. I was confused. So when I pulled my pants down to use the bathroom there was blood everywhere. It soaked through my pants. Then it hit me. The boys were laughing cause they saw my period blood. I quickly changed. I didn’t go back into the movie cause I was to embarrassed. Then that one boy came into my room and told me that it would be okay. He grabbed my hand and we went back into the movie. We have been dating three years now. But that was totally embarrassing. If it hadn’t have been for him I would have been humiliated for life. Thanks
PS: I’m now 14