Husband exploring his sexuality

Me and my husband are separated. Our reason for separation is unrelated to his sexuality. We've been separated for 9 months. I found out he's going to Europe for 2 weeks. I already knew he was taking this vacation and I arranged our custody to fit this vacation but we don't hate each other. But I found out he's using this as a chance to explore his sexuality. He had always mentioned that he felt jealous of me. He lost his virginity to me, while I have been more experienced, have had more sexual partners. Experimented with women. I am mostly straight but do find women attractive and don't mind have sex with them. So I guess I'm bi but prefer men. I've had a lot of experiences and he hasn't so he's using this trip because he wants to experiment and sleep with a guy for the first time and just explore his sexuality as a whole. I guess I'm hurt. We haven't even been separated for a full year yet. And obviously I still have love for him. He couldn't even wait until we were divorced to do this? He's going to go out of the country to experiment while still being labeled legally a husband to me. I'm just so bothered by it.

@Jenee No we aren't planning on staying married.