[ Other - Family & Relationships ] Open Question : I know I wrote a lot but if you don't like it... just simply don't answer?

Does she hate me or is genuinely disinterested in me as a person? This girl who is now somewhat cold (maybe not but...) at least very mechanical in how she interacts with me nowadays.... I've known her for a while as a good acquaintance / nice friend but recently I went on a church retreat and there was not much to say to her (sometimes it was kinda awkward). I became MUCH closer to her friends around her but not so much with her. I think she realized this off the bat and now she won't show much of her previous affection/playfulness towards me anymore. I even get this vibe that she might have grown a grudge against me, even though I never (directly) did anything wrong to her. To me, the "problem" is that I couldn't open up and become playful in the group, despite her few attempts to include me. Don't get me wrong, I made the effort, but I was new and much of the kids were a lot younger than me so of course it took some time... Also, the other problem may be that I started hugging/playing with her close friends but not with her. This wasn't any manipulation or anything on my part, as it happened spontaneously and naturally. Now whenever I see her, she doesn't directly broadcast any resentment directly in my face, but I somewhat get the vibes that she has negative feelings against me (either that or it's all in my mind and she genuinely became disinterested in me as a person, as a friend or potential mate or whatever). She is very mechanical towards me, which strikingly contrasts what she was before. On my part, I keep my positive attitude up always. There are times when things get inevitably awkward but I do the best I can to turn those around. What could possibly the remedy to this situation? Have any of the experts w/ girls been in a similar situation before? IF anyone has an idea or a tought that could clear up this situation,please lend me a hand :)