Help me out bro

I'm in my first year of highschool, I'm 6 foot, Chubby, and a football player. Things with this one girl didn't work out and my ex kinda messed me up a little (im aware that I'm young) so now I'm even more nervous with girls than before. There's this one girl that makes eye contact and looks at me a lot but I'm not sure how to talk to her and my friends aren't much help