Ok, it's not that bad and I'm not really 7.
I do feel completely invisible in the office though. The rest of my team work from home, so there is no one to drink a coffee with, no one to quickly ask about a file system, no one just to vent with so problems stew. I've tried all the things you tell children to do. I tag along with other teams, insert myself into non-work conversations and go to all socials, but I'm no one's problem so I always get forgotten again. I'm fairly sure it's not me and it's just that other teams are busy and have their own stuff going on. It's so lonely though and it means I'm missing collaboration opportunities etc. Even my official manager seems to forget I exist. Despite this I'm actually really good at my job and regularly get bonuses and receive international recognition for my work.
So my problem is, how do I address this with my day-to-day manager without sounding like a 5 year old? Having an assigned unwilling playground buddy was mortifying at 5, never mind 35. Is there a solution I can propose or do I just have to suck it up?