Not bullying. And try not to catastrophize the situation. "Not liking" you is not the same as "hating" you. I was an older student in nursing school, with prior college experience, more accustomed to academia than most of my classmates, and I tended to raise my hand immediately, answer questions, and do what I thought of as contributing, as expected, to the class discussion. Guess what? Not how many of my classmates saw it. Count your blessings -- I got actual audible sighs and eye rolls from some of my classmates when I would raise my hand, eventually. A professor spoke with me, with more finesse than yours did with you, and explained that, by always raising my hand and having the answer to each of her questions, I was letting all the other students off the hook (I still remember her saying, "I'll make a deal with you -- I'll assume that you know the answers to the questions, and you hang back and give the other students a chance to respond.")
I made a few good friends in nursing school, some of the students actively disliked me, which was fine with me, and most of my class and I had no feelings for each other one way or the other. You go to nursing school to learn about nursing, not to be popular with your classmates. Worrying about whether the group "likes" you or not seems kind of high school to me. Most of these people you'll never see or even think much about again once you graduate.
Dealing with real life nursing is going to be quite a bit tougher, emotionally, than dealing with cliques in school. Return to school, MYOB, "keep your eyes on the prize," and keep moving forward. I hope you can move past this and figure out a way to not react to things in an emotional way, or you're going to be doing a lot more crying once you've graduated and started working. Best wishes!