Is it normal to fall in love with a girl in class?

(sorry if it's long...)

So I'm a college student taking a summer class. A few weeks ago our teacher gave us assigned groups for a group project. There was this girl I liked from the beginning, let's call her Corinne. And one of the guys I knew from before and who is in my group is friends with her on facebook and I'm pretty sure they have mutual feelings for each other (for example, always sitting next to each other in class and stuff). Let's call this guy Kevin. So the way it happened is that I sometimes come late to class (not my fault) and there are no available seats in class, so I have to sit between Kevin and Corinne.

After about 3 weeks it didn't take long for me to completely fall in love with her. Not that it matters, but she is tall, athletic, blonde, with blue eyes. She plays volleyball. She was an accounting tutor and is truly passionate about animals, the environment, and making a difference. Last year she dressed up as Rapunzel at Disneyland. Her dog recently passed away from cancer and she posted his pics on facebook and showed how much she cared about him. All of this shows me what a special person she is and I just absolutely love her personality and her.

Today I was late for class again and as I was coming into class I saw Corinne in the hallway talking to someone on her phone, and when I got to class I saw that Corinne's laptop was on the seat next to Kevin, but I had to sit next to Kevin because we're in the same group and so she came into class later and moved her stuff to the seat next to me and she was so sweet about it, saying sorry as she moved her laptop and book. There was a paper on my seat (where she was previously sitting) and she asked me if it was mine, and she was so nice about it. I could barely get anything out of my mouth, I just nodded.

We had an online homework due today that I hadn't even started yet, but she went online and found a website that had all the answers, and she just copied down all the right answers (it was all multiple choice). She didn't realize it but that was a real life saver for me today because I did the same thing when I got back home. It saved me a lot of time and effort, for sure. I just thought it was funny how fate had smiled down on me. How she happened to be in the right place at the right time.

Later in class she was saying a funny joke to Kevin, with me sitting between them, and I just looked at her and smiled. She was so pretty, smart, and funny. When she went back on her laptop I just stared at her out of the corner of my eye during the entire class. She was wearing a lovely white sweater (the building turns up AC really high) and tight jeans with flip flops. Her toenails were painted red and looked so cute. I thought about how wonderful it would be to massage her soft feet. She was checking out some sites in class and I was looking at her fingers and hands. They looked so delicate. I even looked at her funnybone. It looked so vulnerable and cute. I thought about her being my girlfriend and cuddling with her and tickling her. Her long blonde hair looked so sweet and I imagined running my fingers through them. When she turned to the left to talk to Kevin, I just stared at her blue eyes and perfect nose and juicy lips and magical face and it was like time stood still and nothing ever mattered more in my life than the fact that I was sitting next to her.

She did something funny to my mind. She is the only girl I can think about, but she barely knows I even exist. The entire class I was taking deep breaths and my mind was wandering because she is so perfect and charming but it's just so painful to me that I have such strong feelings for her but she will never know about it (or probably even care) because she always talks to Kevin and acts like I'm invisible. Maybe she even thinks I'm retarded.