Girls! Need some advice about threesome 🤔

So lately me and my bf have been thinking about bringing a girl into our sex life just to try it out. I've been with a girl before and I find girls attractive and hot but I also find men attractive and hot. The whole idea is new to me to have both of us with a girl. Not sure if I would get jealous... has anyone tried this? Please tell me your experience and how you got a girl to do it without feeling attached or being used, the last thing I want is for the girl to start catching feelings for my boo or for me or for her to feel like we are just using her.