How should I break up with my boyfriend?

I am in grade 10 and i am dating a guy that is a year older then me. I didnt know him very well when i started dating him and i wish i wouldve but now that i know him better i dont know if i really like him anymore. We have only been dating for 2 weeks and i feel like its pathetic to want to break up with him already but this is stressing me out. I feel like he talks really ually and i feel like maybe hes only dating me so ill have with him but im a virgin and i dont want to. Hes already asked me if i ever would and i told him no but i dont think he believes me. Ive been trying to avoid him lately and he hasnt caught on until today when i didnt text him back like 5 times and i think he thinks somethings up. Im just really scared to break up with him because His friends are really scary and i dont know if theyll do something to me if i break up with him. Please help me, i need as much help as i can get. im not usd to doing stuff like this.