Invisible

Am I the only one that, when you're with one of your friends alone, you're the only person they pay attention to? But when another one of their friends are there, they don't even notice you. It's very irritating because just because someone else is there, they both can at least make an effort to notice you. ESPECIALLY when you're hanging out with them or you're at their house like HELLO I'M RIGHT HERE AND I WANT YOU TO TALK TO ME! Does anyone else encounter this issue with anyone because this has happened to me many times this week and it's starting to become a problem.