Sometimes those who don't notice us, it's best they remain unseen, not noticed, so that we can continue to be seeing God as He wants us to see things. And, for those who don't see us, there's a real God reason for that, not sure what that is, but, it's important to be brave and trust God when it comes to those who are and aren't noticing us, making us feel unnoticed. And we should pray that He shows us our own hearts of what He wants us to notice from, first, being unseen.
Sometimes, too, God does want us to be noticed, it's just us not noticing how He wants us to notify them that we want to be noticed, for that's an act of faith often and belief in doing something 'out there' that makes us turn our heads the other way from where He wants us to really turn.