Help - I think someone may have guessed I'm queer

Today I had a pretty nerve-wracking experience, and it's freaking me out and I don't know what to do.

I take drama at school, and there's a girl in my class who I get along with well, but ever since I started being attracted to girls I feel like she can sense it somehow. She seems especially tactile towards me and will randomly do things like singing love songs and directing them at me, or holding hands with me and hugging me for the slightest reason. I'm pretty sure she's straight since all her friends are and I think she may have dated guys before (but I'm not entirely sure), so I don't think she's flirting or anything. Plus she dragged me into a conversation one time and said that she knows that I don't like to be touched (and I don't - I feel super awkward about close physical contact with girls because gayness), then proceeded to hug me multiple times to demonstrate some story or other she was telling to her friends.

We are acquaintances, not close friends - I don't think the level of physical and emotional contact she's been giving me for the past couple of years that we've been in the same class is normal.

From what I've heard from a couple of other people, it seems that she can be very good at making people feel uncomfortable or inferior and using their emotional weaknesses against them to do that, so I thought that maybe she could sense that I'm attracted to girls because of my awkwardness around them and is exploiting that. I brushed off those thoughts and dismissed them as paranoia after a while and tried to ignore it until today.

During the drama lesson we watched a couple of people in the class do some scenes from a play, both centering around one character being outed/blackmailed by the threat of being outed as gay. They were really good scenes and I felt really moved after watching them, especially when my teacher was giving acting notes and explaining the shame some gay people feel if they aren't accepted. I've always been terrified of being outed against my will or being judged or harassed if anyone finds out and for a while it felt like I could barely move since I was so melancholy. I think it showed as well because it felt like my face was really somber and I couldn't hide it.

A few minutes later I was standing next to the girl I mentioned earlier and she randomly locked her hand into mine just a little, but then a few seconds later she started laughing at me because I held her hand a little tighter without realizing it. I ended up getting really defensive and saying she started it but she kept saying I did and I wasn't sure who was right. Then a few seconds later, she told me she loved me and smiled at me in a slightly fake manner. All I could do was fake a half-smile and do my best to ignore her, but I was so sure that she knew and so scared of what she'd do. I couldn't stop worrying about it for the rest of the day.

What do you guys think? Am I being paranoid or is she actually picking up on something? What can I do to sort this out and how can I hide my not-entirely-straight-ness in the future? :help:

Sorry for the long post. Thanks for reading and any advice is much appreciated. (*hug*)