i don't get marriage.

what's so special about a relationship that happens to involve sex that two people get to commit to love each other for the rest of their lives? why is it okay for friendships to slowly fade across distance but it's the end of the world when it's romance? what i mean to say is, i care more strongly about my girlfriends than i can EVER really imagine caring about some dumbass guy. why isn't there a way to commit to love each other forever, to perform the necessary maintenance on the relationship, to be heartbroken when we're apart...? i mean, yeah, it's a lot more logistically difficult when you think of more than just two people, obviously five people have to go their separate ways i guess, but...idk. i'd rather be married to caitlin lindsey ashley latesa, in the sense of commitment and love and putting effort into the relationships and cohabitation, and just use guys for physical needs without getting emotionally attached.