WARNING! Whining, moaning, & general self-pity ahead

When I was a kid, even into college, I didn't really feel like a Lonely Only because I had my seven awesome cousins (both sides). Now, though, it's obvious that I am very much a singleton. Maternal side, there are 17 great-grandkids & three on the way. NOT ONE came to Marty's birthday despite all being invited. Three of my cousins are currently pregnant, but ONLY ONE told me. I found out about the other two third-hand, & they're the pair I feel closest to (Mom's side). Now I've found out that another got married two months ago! I didn't even know! I don't even know his new wife's name. I'm an Only, & all I have now, as an adult, is me. At least I get to see my closest paternal cousin almost daily! I didn't even get "happy birthday" texts this year. I feel abandoned. I feel forgotten. I feel alone. I am a Lonely Only after all. When Geoff & I are gone, Ellie & Marty will only have each other. I have no siblings to grow old & laugh with, no one else to share my burdens & memories. I thought my cousins would be there, but it's obvious they won't. They forgot me. I always thought our kids would grow up close, but they don't even know each other - or me. I try not to care, but the whole babies & wedding thing has really, really hurt me. It's just so obvious now that I don't even matter to the people I loved most.