If you ever feel invisible, and you feel like no one understands you, and you do anything to get ANYONE'S attention, know you're not alone. I've been there many a time, and so have many other people. Just keep in mind, even though it may not seem like it, there are a lot of people that are happy just because you exist. Keep in mind, how those people would feel if you left them.
Invisible isn't the only song. Just Keep Breathing and Say It Now, by We the Kings really help me when I feel neglected. It tells me that I'm not the only one who feels like that.
JUST KEEP BREATHING, AND DON'T GIVE UP. NO MATTER HOW BROKEN THINGS MAY SEEM, THEY CAN ALWAYS BE FIXED. EVEN IF IT'S ONLY FOR A LITTLE WHILE.