<human>: (I'm writing this on a throw away account because boyfriend frequents this sub, so some info has changed)

My boyfriend and I have been dating for more then a year, and living together for about 7 months. We've known each other for 5 years just as friends and I've always cared about him.

The relationship is great. We have our normal bickering and arguments, but one thing that always makes the relationship worth wile is the sex. We have phenomenal sex, with both of us coming out feeling fulfilled and more in love with each other. We've started experimenting more, and it's made us way more trusting of each other both in and out of the bedroom.

My previous two relationship were with women. The sex wasn't nearly as good as with him, but I really loved having sex with women. It made me feel more sexy then I have ever felt. Although the relationships ended badly, I really miss having sex with women in general. 

At the beginning of the relationship, I threw around the idea of having a threesome. He has had one before and was pensive about it to say the least. He said it was difficult to enjoy and he wouldn't want to do it again. I would occasionally joke about it, but I had resigned myself that it wouldn't happen.

A couple days ago, I jokingly talked about it once again. And this time, he seemed much more interested. We talked about the logistics of it (who the third person would be, how we would ask the person ect.). I'm not sure how well it would work. I'm so incredibly in love with him and he's the same with me. I don't want feelings to get in the way, and I'm really excited for it now, but I think that I would get jealous seeing him have sex with another woman. I know neither of us would want to have more of an open relationship, but since I don't have experience I'm not sure each of us would keep it purely physical. Anyone have any advice or any help?

Condense the text into a few key points
<bot>: I want to have a threesome, and my boyfriend reciently warmed up to the idea. I'm afraid I'll be jealous. Anyone have any advice, suggestions, tips?