(2) A fuck buddy with whom emotional feelings are present and mutual, but not discussed and no commitment exists.
Ashley: We haven't really talked about it yet, but we'll have our 5th date tomorrow. He's definitely more my non-boyfriend.
Also works for nongirlfriends.
Rachel: How many times do I have to tell you? He's not my boyfriend!
Jessica: Fine. He's your nonboyfriend then.
2. He's called my "non boyfriend" because I just use him for sex. I'll tire of him faster than Omar tires of his ho's. Ha! Ha! Ha! Just kidding...
Non Boyfriend can also be a great title for someone in the case where you don't quite know where they fit in your life. You know you want them there, but you aren't exactly sure how they fit in the long term picture. Non Boyfriends are great for non-dates & non sex as well.