I need help...please read!!

I am 13 years old, and I developed a huge crush on one of my guy friends. We sit together at lunch everyday, and we have inside jokes and stuff like that. Like i said, I developed a huge crush on this guy BUT the only problem is one of my really good friends is dating him, and they’ve been dating since before i started liking him. Also, i could just be paranoid or something but it seems like lately he’s just been kinda irritated with me. I’m not going to tell either of them since they are happy together, but honestly this is killing me! Any advice please?