I think he's concerned about harming the relationship because it's the first real relationship he's ever been in and he's worried that sex could potentially ruin everything.
All of his texts were like this (exact words, I slammed them all together though):
"Well, I just had to ask because I was assuming that I would have to bring it up sometime, so I just said it. But I don't want to do it unless neither of us would get hurt from it and most of all only if you're comfortable with it. And I am totally glad that you would be comfortable with it because if you weren't I would drop the subject immediately if you were the least bit unsure. I don't know a whole lot about this stuff but if you're okay with this I'll still be okay with it too. But I still think we should think about this though before we do anything. Yeah I really want to think about this for a while before we do anything because it is a really big step and I don't want to ruin this relationship because it's my first one and everything is going by really smoothly and good as it is. But I trust you and I'm always confortable with you. Since this relationship is going so great I really want to think about this before I decide that I'm at least ready for sex. I trust you and love you and always will. It's not only a mature way but also a very smart way too. And I really want to be careful because I don't know what sex would do to this relationship. I would hope for the best that it would only be good but you never know. As I was about to ask you I was thinking to myself 'I think it's running through her mind too' I actually wanted you really badly, like really badly... but I somewhat contained myself and I thought I should bring it up to see what you thought about it first. I personally want to wait and think about this for a bit."
I personally don't think it would ruin anything, I am sure of what I'd be comfortable with, but maybe he needs a little more time to think about it all.
Maybe he's also a bit anxious? Maybe I could try initiating it at some point but I also don't want it to be rushed. I especially wouldn't want him to regret anything after we would especially if it was a "heat of the moment" type of thing, even more so if he would still be unsure.
I know there's a ton of intimate things to do without sex, which they all only intensify the urge to actually have sex, at least for me, but I am sure it does for him also. But if he does want to wait or is confused I respect that and I'd rather both of us be completely ready anyway because then we'd both truly enjoy it and I'd never rush him to do anything or want to make him feel uncomfortable like that.