I'm glad you enjoyed your two days. Not a lot of people get chances to live out their fantasies with living (and safe) partners, and so I think you'll have a good time during your two weeks.
It sounds as if you're leaving it open as to whether you'll have sex or not depending on how you will feel. I gather this would be your first time with a male? My spidey senses tell me that if he is willing to live out the fantasy with you, then he is hoping that you will go for it. Hopefully he will be patient and he will not resort to poor behavior, should you decide to not have sex with him. But, I also have the feeling that thinking about it, talking about it, and the experience of living out your fantasy during the daytime is foreplay for what might come at night, and so I don't think your friend will be disappointed.
And I don't think it matters whether your label is straight, gay, or bi. Cisgender labels don't fit well with people who cross the gender boundaries. We need a whole new set of labels for that.