my older bro is a model and steals all the girls i talk to

I have an older brother who’s a model. He’s 6'1, extremely goodlooking, and we look nothing alike. I’m 5'8 and pretty average.
I love him and we’re basically best friends, talking every day.. but growing up with him was tough. At school, girls would only talk to me to try to get me to set them up with him. Even though he was older, a lot of my attractive classmates would find him on Instagram and DM him, and he ended up sleeping with many of them.
No exaggeration.. he’s slept with over 1,000 girls. I’ve seen weeks where he slept with 7 girls.. basically one a day from apps like Hinge or Bumble. He’d show me his apps and there would be 100+ messages from girls who were honestly 10/10s, many willing to sleep with him on the first date. Sometimes he’d match with a beautiful girl, tell her to come over, and she’d just show up at our house. Dating is so easy for him.
Living with that made me feel like less of a man, and it wrecked my dating life because girls around me would always end up liking him instead. Eventually I stopped telling girls I had a brother and just pretended I was an only child.
Then he moved abroad to focus on modelling and stayed there for 5+ years. My romantic life improved massively once he was out of the picture.
Now I’ve found out he’s moving back to the UK and wants to live in my apartment. I have a spare room, so logically it makes sense.. but I’m honestly worried.
I know exactly what will happen.. he’ll match with every girl in my town on Hinge/Bumble and end up sleeping with them, leaving nothing for me. This has happened before many times when we lived together. I’d match with a girl, talk for weeks, go on dates.. and then he’d match with her and sleep with her on the first date, or get nudes as soon as he got her number and show me like "isn't this the girl you took for dinner last week, she just sent me her t*ts" and show me.
His usual response is: “Bro, don’t be annoyed. I’m filtering out the unloyal girls for you.. you wouldn’t want them anyway.” But the truth is it feels like EVERY girl would do it with him. He’s so goodlooking that even girls who seem genuinely nice can’t resist. It made dating really difficult for me.
For example, I once dated a girl I met in real life for about two months. We hadn’t slept together yet.. just kissed and held hands. I told her about my brother and showed her his pic and mentioned how all the girls love him and she even said to me "don't worry i'm not that type of girl and would never do that to you, you're more my type than your brother". So I felt secure in us dating and invited her round. Then when she came over while my brother was home. We were all drinking and playing board games and I left the room for about three minutes to use the bathroom. When I came back, she was lying with her head on his lap. My brother quietly told me that while I was gone she had been grabbing and rubbing him over his trousers. I got angry and stormed out, expecting her to follow and apologise. Instead, when I came back an hour later, they’d had sex and she was in bed with him. Then I got the same lecture about how he was “testing loyalty.”
Another time I dated a girl for six months. With whom I had already slept with and was more seriously dating. After all that time he decided to “test her,” found her Instagram, and DM’d her. She replied and started talking to him. I begged him not to sleep with her because I really liked her, so he ghosted and blocked her.. but the fact she engaged with him still showed how easily this happens for someone as goodlooking as him.
Now although he does all this he is a good brother, and tries to help me e.g. he will bring me to the gym with him and try train me so i can improve my confidence and get in good shape, he also helps advise me on outfits to wear and also gives me advice for texting girls and what to say etc.. so he does try his best to help me.
Even when we go out together, girls approach him. Sometimes he trys to helps me.. so whenever girls are obsessed with him asking to meet him he will refuse to meet them unless they bring a friend for me.. but even then it backfires. After the double date, the friend who was supposed to be for me often ends up liking him too, because the whole conversation and attention naturally centers on him.
Now that he’s moving back, I honestly don’t know what to do. Even if I say we shouldn’t live together, he’ll probably rent somewhere nearby and still match with the same girls and repeat the same pattern. I really feel insecure and paranoid now I know he's coming.