Would you find this weird if one of your friends did this too?

Okay, im 17 and so is my friend Lauren and my cousin Ryan. My cousin lives in new jersey, and we live in maryland but for some reason lauren and ryan friended eachother on facebook and theyve been talking for awhilee now, and im having a family get-together coming up and Ryans like "bring lauren or ill never like you again". All i said was "I find that very weird and annoying that you guys are talking like you have a thing, you dont even know eachother" Laurens saying how i dont know how much she knows about him, and they really know eachother well, they oovoo with eachother and laurens other friends are now friends with him on fb. I just find it all really creepy and stuff cause its my cousin! Im bringing one of my other friends to the family get-together because its outside and ryan and lauren both smoke and hes like yeah we'll just go smoke in the woods its nbd. and i asked them both, wouldnt it be weird if i had a thing with one of your best friends?! or for lauren, her cousin, and she like only cause hes 16. im like really...thats one year difference, you have no excuse. Im sorry for blabbering but it really pisses me off. would you find that weird?