FWB to love? (sorry to post again)?

You already sound like a couple by the way you've been talking. Just read over what you just posted. He acts the way a boyfriend should act and hopefully your doing the same on your bargain. Perhaps you havent placed the title with your relationship at the moment but it won't ever be placed unless one of you brings it up. If you still want to sleep with him then dont be like hey i think we should go out like steady girl/boy friend but instead just tell him what you told us but say you dont want it to ruin whats there and if he stills whats to be FWB and thats all then you'll accept it - but only if thats what you want and you can let this issue drop, otherwise you wont be happy.