A guy problem

I liked a guy and I asked him if he had a girlfriend but he told me no so I started to let my self like him. After that we talked for about 2 months but at school during that time period his girlfriend(who I thought was his friend) would stare at me and I thought nothing of it. But something seemed off because when I would smile at him he wouldn't smile back or acknowledge me. Then couple days after that he blocked me on Snapchat and I had my friend ask him y he blocked me he said his brother did and I believed him but his brother and me are friends or so I thought. I asked his brother y he blocked me but he said who's hands did it tho so it made me think if he intentionally blocked me so he would get in trouble with his gf or because he didn't like me but one day after school him and his gf was standing by the junior gate and she was standing so close to me and I was getting nervous so I told my friend let's go somewhere else but she pulled my bag and I let her(felt like an idiot in that moment for not doing anything) anyway his brother was there also on the side watching and she told me m how she doesn't share man and do that s**t but I didn't say anything BTW he was just standing there on the side listening to her tell me these things making it sound like I'm a how when I asked her boyfriend if he had a gf but anyway I blocked him on Snapchat and Instagram and never got a apology or reason y he did this to and i want to ask him if it was a joke if him and his gf meant doing that to me or if he didnt mean to do itm

ps. he told me he had a gf the night before but I didn't believe it and there's a senior and junior gate and everyday they come and wait there like there punishing me or tryna make me feel jealous because there hugging and kissing and she gives me the eye and her lil sister to he made k like a that and I'm not I want to say something but I'm afraid idk y