Apologies in advance for the long read.

I (24F) have been dating my current bf (25M) for about 5 months now. My bf is Saudi Arabian, and while he’s not religious his family is muslim. He was born and has spent a majority of his life in the US. His family moved back to Saudi and he stayed in the US; he goes back to visit them a few times a year. I’m jewish, my family knows I’m dating him and they have no issues. A month ago, we were at dinner and he made a comment about how he hasn't told his parents he's dating a jew. I talked to him about it the next day. I told him that I don’t expect him to tell his parents about me right now, but I don’t wanna get to the point where we’ve been together for a year and I’m a secret. I said that I could see myself in a long term relationship with him, and that I didn’t want to be 3 years in and then get dumped because his parents don’t approve. He agreed and said he wouldn’t do that to me; we talked and at first he said his parents would be upset because I’m not muslim & because I’m jewish, then said he didn’t know how they would react, and then said they’d be more upset that he’s making a life for himself in the US. We agreed to navigate it together, and he said his parents would accept it over time. I do know that his brother knows about me, but I don’t know if he knows that I’m jewish. He had a girlfriend before me that he dated for two years, and based on what he told me his parents never knew about her. His parents have been pushing him to move back to Saudi for a while. His father gave him an ultimatum of moving back to Saudi, saying that if he didn’t move in the next few years he wouldn’t be his son anymore. Generally, he hasn’t always done what his parents push him to do. He lives in the US, and works in a field that his parents don’t approve of. He tried to tell his family he wasn’t muslim once and it didn’t go great.  I have a tendency to self sabotage when I sense I’m going to be hurt, I almost ended things the night we had that talk because I was convinced that I would just end up hurt in the end. When fight or flight kicks in, I tend to fly; This is something I’ve worked on a lot with my therapist. He’s visiting his family right now; he’s been gone a week so far and won’t be back for another two. I think the distance feels like a threat to me right now. I  prepped myself for this trip, I made lots of plans with friends and designated time for projects because I knew I’d get sad. I’ve been sick the past couple of days so I’ve been stuck at home and I’ve really gotten into my head. We’ve talked minimally which is fine, I appreciate him checking in with me when he does. We haven’t talked about him telling his family about me since our initial conversation, and I’m worried he’s going to tell them about me on this trip, they won’t approve, and he’ll dump me when he comes back.  I know this could very well happen and it would be completely out of my control, but I can’t stop worrying about it. My brain keeps telling to just end things with him now, because I have to cut it off before I get hurt. Do I want to end things with my bf? Absolutely not, I was planning to tell him that I love him before he left but I chickened out. I haven’t sent anything, I’ve forced myself not to because I know it’s my fight or flight. I feel like I’m being extremely toxic to our relationship right now.  The cultural differences are really starting to stress me out and I won’t be able to talk to him about it for at least a couple of weeks. I don’t want to hit him with a serious relationship talk as soon as he steps off of the plane.  I have no idea how to go about it. He does things to show me he cares for me, he was offering to door dash me food when he found out I was sick, despite being across the globe. We were talking about a coffee date when he gets back- I’ve just mentally convinced myself that it’s over. 

TLDR; I’m jewish and my bf is arab, the cultural differences are starting to stress me out and I convinced myself that he’ll dump me because his parents don’t approve.