SUBREDDIT: r/relationships
TITLE: Me [23F] with my friends with benefits [23M] of one year. I'm developing romantic feelings for him
POST: I have been friends with befits with a great guy for about a year. At first we would only see each other about once a month. Recently we started hanging out every weekend. We have sex but we started doing other activities together too (museums, dinner, bars). We have a lot in common and I can honestly say he has become one of my best friends. I have developed romantic feelings for him and would love to have a more serious relationship. I'm afraid if I bring this up to him I will ruin our friendship. I'm not sure what to do.
TL;DR: 
I am developing romantic feelings for my friend with benefits and im not sure if I should tell him or how to tell him without ruining our friendship.