Does infatuation go in hand with idealization?

Not necessarily. I was infatuated with a rather homely guy in high school. Even though I knew objectively he was nothing to look at, I was fine with it. I might attribute it to chemistry. Your friend probably has a lot of chemistry for him at the moment. That doesn’t necessarily mean she’s obsessed with or has idealized him. She’s likely just excited about him at this time. It wears off.

Cupid draw back your bow,the rest is history

I heard a line from a show that perfectly describes this. A little boy was introduced to another little girl. Her brother described her as very pretty. The little boy said he doesn’t see it. She’s not pretty and filthy. After some kindness and the risk that the little boy and girl took in hiding him, he told her he still doesn’t think she pretty but he sees now she’s very beautiful.
He wasn’t infatuated with her but to him the beauty of how she was on the inside made her very attractive on the outside to him.
There are times when we don’t see what the outside world sees because they see their real beauty.

Have you ever met an attractive person with a brilliant smile that lights up their face and makes them look attractive. Or bright expressive eyes or dimples. I remember when I was a teen I like this one guy that other people didn’t think was attractive. He was a very gentle person and so sweet and always thought of others. I realized the more I got to know him the more he seemed attractive to me. I mean I could still see the flaws on his face (his nose and chin where large) but I didn’t think he was ugly. And when he smiled he lit up a room.
I’ve also known guys who were extremely handsome who had personality that stuck in my throat like a huge ball of flem. They became repulsive to me.
We all judge with our eyes but our feeling determine what is ugly and what isn’t.
It’s why people say beauty is in the eye of the beholder.
Now the ones I don’t get is when a person is ugly inside and out. Then I wonder, what the hell.