I need help with this boyy!!?

Ok well im in 7th grade..and i really like this boy his name is ........ and hes one of those boys who everybody doesnt like they runaway from him one last thing hes a nerd..and since i had a chance to talk to him for my first time we started talking about my friend named chris who hates ....... It went well and i was happy i was finally going to become good friends with him..but when i introduced him to my friend brianna..once they met he payed more attention to her and not me..since im a leo they get veryy jealous..after that day they became good friends..but brianna knew that i liked him soo i think she was trying to get me jealous.soo they became very good friends they hug, they laugh and he defends her..its sadd my friend doing that to me so i lied and told her that i didnt like him to see what would she doo..but it went onn..but worse now they walked together..and she tells me that her friends say that he likes her..and since we are going to 8th grade. he is going to hang out with her and i have more chance talking to him. right now im loosing weight, im going to be nice and act smart..and what i wanted to know was what do i say and do? when i see him the first day of school i want to get his attention for he could hang out with me..and get her jealous?? please helpp :) thank you