Oh yeah, the one person who hates me happens to be my best friend's girlfriend, and I have no idea why. She just does, and I can tell.
Jealousy. You're competing for his time.
No, I don't think that's it. They are in Orlando going to UCF, I'm in Gainesville. I only rarely come over...
I have this girl friend. Let's call her Lizzie. Lizzie and I have been friends for... holy crap, more than 15 years now. She's dated two of my friends. She and I love each other (as friends) -- I wish we'd dated, but it never happened. We're both married (to other people). We both have kids and lives.
A couple of years ago, I was talking to her about my relationship with my wife, and some rough patches. She offered to hang out with my wife, let her talk if she wanted to talk (my wife had been friends with Lizzie for about four years at that point -- often Lizzie and I lived in different geographical areas so my wife didn't see her much). I said that might be a good idea, and so a week later, off they went, just to have lunch and chat. Lizzie never brought up that I talked to her about my problems at home; she just listened.
Two days later, my wife called me at work and asked if I'd suggested that Lizzie get together with her to talk, if it was my idea. She was very accusatory. I told her the truth -- that it wasn't my idea, but that I knew about it -- and my wife flipped out.
Then she demanded apology after apology from Lizzie (basically bullying her), who eventually told me she had to give up, that she'd done all she could to help me mend the situation. My wife kept e-mailing her, pushing her to say something she wanted to hear, but she never got what she wanted.
I've seen Lizzie twice since that day -- once on my lunch break, and once more for the baby shower for her twin sons -- and both times were in 2008. Now Lizzie has moved to another state (her husband got a job there) and it's unlikely my wife or I will see Lizzie more than ten more times in my entire life. I barely talk to her; I'm afraid that if we get too close I'll start to get angry again about the whole situation. Every time Lizzie comes up in conversation (my wife brings her up; I never do), I hear about the situation, or about how Lizzie won't friend my wife on Facebook, or how Lizzie never responds to her e-mails.
The point of this whole story is: it doesn't matter what you did. If you ticked off your friend's girlfriend (or wife), she'll never, ever forgive you, and she'll make him miserable until the two of you start to grow apart -- which is her goal. Hell, my wife has already started working on some of my other friends now.
TL;DR: Don't discount too quickly what Talia said. It could be that, or it could be your notes on recycling. Could be anything. Jealousy is ugly, and it can seriously hurt people without them realizing that jealousy is what's doing the hurting.
(Yeah, I know, not every person is this vindictive, but this is my experience. You may have others.)