Is it normal to look at pictures of people i really miss all the time?

I feel so embarrassed asking this. There are a lot of people I miss from my treatment center all the way across the US, and so ill just scroll to their instagram page and look at pictures of them and listen to music and imagine all the things I'm gonna do that they're gonna get to see one day. I act a lot in my room, actually, and that's normal, I think, but... but I feel so un-normal. No one else I know does this. At least, I don't...think they do. But like different music mean different things to me, and I ALWAYS imagine a 'scene' to each one, like in a movie, and then ill randomly walk around upstairs, listening to the music of the scene I want to think about, looking at pictures of them because I miss them so hella much, and then I'll think about how cool it's gonna be that they'll see me accomplish all these great things (writing a book, making a movie, etc). I feel so bad about it, dude. I don't get it.