I hate my husband's boyfriend.

I(25M) have been with my husband(28M) since we were children, married just a few years ago. Now to the point, my husband, who i'll call B, has always needed more then one partner to be happy, and that is not something I have ever cared about. Our relationship has always been open, and I never have any problems with his other boyfriends or girlfriends. And I wanna make it clear that my anger has nothing to do with his need for extra love. His newest boyfriend, L, is just annoying. L loves to play jokes and pranks every day, everything about him irks me. I want to punch him in the face everytime he opens his mouth, I hate him so much. However, B has been through a lot of trauma in his life, and L helps him feel safe and loved in ways that only I have ever have. And as much as I hate L, I want B happy even more. I'm not here for advice, I just wanted to let this go. Thanks for listening.