How to help a friend who is gay? 🤔

So I have a friend who told me he was gay yesterday. We have been best friends for years, so I already kind of had a feeling he was, but I wasn’t sure because he has had a girlfriend for the last 3 years. Well he called me yesterday morning and told me he has been talking to a guy. The thing is, he has always cared a lot what others think about him. And we live in the “Bible belt”, so unfortunately there will be judgment and negative feedback from others. So he said he didn’t want anyone to know yet. He has only told me and his mom and one of his other close friends. Well he asked me for my advice. He wants to tell his girlfriend because he thinks it would be wrong if he didn’t, but he also doesn’t want her to go and tell anybody that he is gay yet. I wasn’t sure what to tell him, or how to handle the situation, because I just have never been in that before. I don’t think he should lead her on, but I also don’t think he should tell her because of the chance she may go tell everybody. What would you do in this situation? And also, I can tell he is confused. He mentioned at one point he just “didn’t know what to do” because he said he loves his girlfriend now and cares about her, and even is sexually attracted to her, but he has never felt anything with her like he does with this guy he is talking to. And he said he finds other girls attractive but never thinks about wanting to have sex with them, or act on anything like he does with other men. Is that normal to feel? Does that mean he is gay or bisexual? Sorry if this entire post is confusing. I haven’t had my coffee yet 🤦🏻‍♀️😂

And also, I️ apologize for posting anon. I have a friend who uses this app and I don’t want her to see it just Incase she knows who I’m talking about.

Thankyou!! 💜💜