Is it normal for a woman to have this kind of relationship with her brother?

I'm not trolling. Please don't troll me.

My little brother is very good looking, like, model good looking. This is an objective opinion, unfortunately he's short so he can't model but everyone says he has the face for it. He's also extremely intelligent- he's in the top 2 percent of pretty much every exam he sits. We get on ridiculously well. As well as best friends. We've always been incredibly close, I saw his first steps, heard his first words etc etc, and now he's old enough we drink etc together and hang out a lot. He's nearly 18, and very mature for his age, I'm 22.

Sometimes I find myself having thoughts like "I wish I could meet someone as clever as you", or "I wish I could meet someone I could talk to the same way I can talk to you". Or even, "I wish I could meet someone who was as good looking as you". To clarify, I have never looked at my brother and thought "I wish I could be with you" or "I want to touch you" or anything remotely like that, even typing that out feels gross and weird. But I do get pleasure from looking at his face, the same way I do from looking at a good looking woman (I'm female and straight). And I think, he's so good looking, he's so nice, I wish there were guys that good looking and forward thinking who liked me.

So this is all pretty normal so far...I'm sure most chicks have a male best friend/brother/father who they admire and wish that they would meet someone handsome with the same good values and personality as that person...but...

I met this guy, Ari, and I fell for him sooo hard. SO hard. We got on ridiculously well, we'd stay up til 6am talking every night we saw each other...well the thing is, he thinks the same way as my brother. Me and my brother think in the same way and enjoy the same things, and this guy thinks that same way. So that's great, like a soulmate, except then I realise this guy kinda LOOKS like my brother. I mean he doesnt actually, if you put them together their faces aren't similar at all, but if you analyse their key features: they are both slim (although Ari is tall and my brother is short), they both have smallish slanting blue eyes, large, striking noses,reasonably full lips, and wavy brown hair. Again, somehow this works out that they look nothing alike overall, but the similarity is still there!

It's enough to freak me out. I'm sensible enough to know that I'm not sexually attracted to my brother at all, I know that for a fact. But there's something weird about this. Are me and my brother too close? Or is it normal to have a male role model, even if he is younger than you, who you expect all men to measure up to? Is it normal to fall for a bloke who is nothing like your brother in person, yet very similar to him on paper? Please help...