<human>: There's a guy I know (I'll call him Ser) in my friendship circle who is very close friends with my best friend, they've known each other for nearly their whole lives whereas I've known the both of them only six months now. The thing with Ser though is that I get the pressing feeling that he really does not like me. My reasons?

1. Sent him a FB friend request when I first met him. He never added me back, if I go to his profile I cannot click on the Add Friend/Resend Request button. 

2. We've never spoken a word to each other past the day I moved to their school. I'm deathly afraid of talking to him because I feel like I have no idea how he'll react. 

3. He keeps looking at me, whenever we're in the same room or on a train with our friends, etc. A staring-sort of looking. As soon as I look back at him though, he looks away. 

4. He's never once smiled at me. He smiles at everyone else.  

5. In class, he doesn't sit next to me ever. If there's a spare seat next to me and another next to that, he'll sit in the one furthest from me. 

I honestly don't know what I did to make him this apathic towards me. Any ideas why he's behaving this way? I'd like to be friends with him but I have no idea how to make him start being civil towards me.

Provide a brief overview of the text.
<bot>: My best friend's childhood friend doesn't like me, what can I do about it? I want us to be friends, though.