Dude. Duuuuuude. You can't just avoid going anywhere there might be children for the rest of your life like they're some sort of plague. Well I guess you can, but you can't expect people not to take that shit personally. Look, if they're your friends and you care about them, you suck it up for a couple hours, smile, them pretend you have a headache or something and dip early. But outright refusing to even minimally inconvenience yourself to celebrate the union of two people you claim are your friends, and then going on to make it about YOU and some perceived slight against you? Come on, bro. That makes you look like the world's most narcissistic a-hole.