Threesome newbie

Lakota

Okay. So my boyfriend recently told me that his biggest fantasy is to have a threesome with me and another woman. I'm interested in doing that with him I think it would be fun for the both of us but I'm so nervous and have no idea how to even search, let alone bring up a threesome to someone. He said I can pick the woman, someone I'm comfortable with but I dont know anyone that would be interested in doing this. I dont know how to even really have a threesome; since I've only had sex with one person at a time. So I guess basically I'm needing pointers, advice and a woman who would only want a one night stand with me and my boyfriend. We both live in Colorado by the way.