Girl, how did YOU screw up the non-relationship? By texting his too often for ONE DAY? Or even a few days — it doesn’t matter. 14 months of connection, with a guy saying he loves you, and he ghosted you because of a few dozen texts? Jesus. You seem like a smart and decent person, you deserve to have a high self-esteem. Please understand there is no fault of yours in this. You found a f***boy, a Peter Pan kind of a guy, and he flopped the moment you did something insignificantly irritating to him. Not to mention, ghosting is the most immature way to end things.
This guy has an emotional intelligence of a 5-year-old. But you were only friends with benefits, so please move on an soon as possible and forget about this dude. You deserve someone nice.