<human>: Can you succinctly summarize the text in 1-3 sentences?

I am F20 in a current long-term relationship with a M22. Though we have a good relationship and a healthy sex life, I can't help but want a 3 way (1F,2M). That's not the only issue, however... I want the 2nd M to be my lab partner. There is a significant amount of sexual chemistry between us and, though I would never cheat on my SO, I would enjoy incorporating him into our sexual exploration. This poses 2 issues; 1) My bf is not fully into the idea of adding a 3rd, let alone a male, & 2) my boyfriend is already a little jealous of my lab partner.
<bot>: I'm not a horrible person who will cheat on her bf, but how do i convince my bf to have a 3way with me and my lab partner?