Threesome

My boyfriend of 2 years and a half has always told me since the beginning of our relationship that one of his fantasies is a threesome with another girl and in the beginning i told him that was one of mine too and that I’ve been bi curious for quite sometime I like lesbian porn and threesomes so I would get that I would like to experience having sex with a girl but I just don’t know about him having sex with another girl while I’m watching he says it’s okay if I don’t want to but I kinda want too but then I don’t because I know I would kill her after lmao he says he’ll pay more attention to me than her that he just wants to see me do stuff with a girl that it’s hot but idk if my jealousy would allow that like I want to have sex with a girl while he watches but not him actually stick his dick in her and I know i sound like a hypocrite because like if I’m having sex with her why can’t he too what are y’all thoughts should I tell him I wanna do it or no