Why is my little brother dating people who look like me?

So i noticed my brother whos around 18+ is dating people who look similar to me, his 1st girlfriend was a white girl, freckles, on the bigger end just like me. Only i thought she looked better and skinnier but even i noticed our resemblance, i never thought he would even date someone like her but yeah.. I don't know what happened but that was months ago. Today i saw him with a new girl who has my same body shape and everything! I was super weirded out by that. Bc my brother had always been kinda mean towards me and favors my mom and everyone else over me. I'm the scape goat of the fam. But yeah i find it kinda uncomfortable that he's dating people who look like me but it could also be that he's undersocialized so he chooses people who he feels a familiarity to. Im low key disgusted but what can you do. It's also annoying how he doesn't respect me but ofc, is dating people who look like me.
Why is my little brother dating people who look like me?
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