[ Singles & Dating ] Open Question : Is he too immature? (Please help.......)?

[Disclaimer: Sorry this is so long. I hope it is an interesting read.] I have a f*ck buddy, And I would like to have a talk with him to set some boundaries. Background: I'm into him. All I want, is to spend more time with him. I have a problem understanding how his desire for sex...makes him immature. As a result, I often cannot carry on on a strong argument to kind of...get him to see the light I suppose. He has a very strong point -- that it is normal for guys to do what he is doing. And, well, he has a healthy libido. If he were to deny his libido, that can't be healthy. On that point, I completely agree with him. the only arguments I can put to him are "selfish" ones. "I would love a relationship"...."I worry about sex getting in the way of our friendship"....Stuff like this. I say it is selfish for me to think in that way....because he has raised the point that whether sex goes down....is up to me as well....He has the drive. He always wants sex - that's a given. Because he is always horny, and he is not repulsed by me. I consent though. According to casual sex rules (well...if i can put it that way)...he's not wrong. According to "casual sex rules", I would be being demanding to demand more attention from him, and to demand more of his time. He is too busy (so he says, and well, I believe him. He really is. But having said that...nobody can be too busy to reply a text message, or call at the end of the night.) I am often very confused. he is (apart from ignoring me often), probably the nicest and least beligerant guy I know. He always says "i would like that, if that's okay with you." He is SOOO good looking (actually the best-looking guy I know), and he is clean and neat. And he was willing (readily willing) to help me fold my clothes. There's more..(naturally) But to cut a long story short.... He can't commit at all. I always tell myself that the reason for that is because his father left his mother and married someone else. But..obviously that cannot be all. Well, I worry that he's just not into me quite enough. And with good reason. Obviously. However, other than that, this man ticks all the boxes. I'm basically a girl waiting in line. What are peoples' opinions on my predicament? Thank you so much...