<human>: Can you summarize the given text in a few sentences?

So Im 20 yrs old and have been with my boyfriend for three years now.
He was my first, and I've never had sex with anyone but him. We enjoy a very active sex life with each other and are in love. In bed recently, dirty talk has consisted of him watching me get it for the first time from other men, and then refined to just this particular guy friend of mine.

Its hot, but today he told me he actually would not only be okay withit but would WANT me to actually sleep with this guy... and i have plans to see him this coming weekend.
What do i do? He says he would never expect me to be okay with him doing the same unless it was a threesome, that this would only be a one time thing, and that its only okay bc he knows about it. Also so if we were to get married he doesnt want me to regret never being with anyone else.

He says for him, he thinks I'm really hot wants me to record my friend and I so he can watch someone go crazy over my body and enjoy that part of me that no one else gets to. He watches porn often and says he wants me to make a video just for him.
<bot>: committed boyfriend wants me to sleep with my friend and record it, I'm worried itll ruin a great relationship and that one of us will regret it afterward.