Listen, I don't think that he's straight. I'm really good at reading people, especially queer people.
I'm not saying he's gay, he might be something else (there are tons of other things he could be). He grew up on a rural part of Georgia and in a religious family, he's the only son they have, he's best riends with his mother... I personally think that Survivor was his first time spending time with queer people without the shadow of his community casting over him and he might need some time to figure things out.
Facts are: he follows a ton of queer people for someone who's just an ally. He instantly connected with the queer people on the island and those are his best friends post-show. He's coming out of his shell. He grew up not feeling like someone people would want to date and surrounded by southside straight people. Smart as he is, these things takes time.
Regarding OF, I don't think he's ever doing one. He cares a lot about NASA and I personally think that it's a life long dream he's going to persue. He's just starting his career - he said he's still a student.
Sorry for the long essay, I wish I had gotten to this thread before.