Can't get anything from his words. However, "shield you" sounds weird. Anyway, look into his eyes next time he says something. The answers are all there. Even the ones you don't want to hear!

no... it sounds like he is saying that he has other things to do at that moment. definately does not sound like he is breaking up

Those are mixed and confusing messages.Just be careful ! I am sure you feel kind of confused about this relation or you wouldn't post a question here. If he keeps giving you always contradictory messages it could be signs of emotional abuse. Keep this in mind, if you choose to advance in this relation,so that you don't get too much emotionally involved with him or fully trust him and time will tell ;)

I think you like the guy, and you fear losing him, but if he is truly interested in you, he will be back with you.

He likes and admires you and sees a relationship with you in the future when he said "I am impressed by you and I want to shield you and build something with you." "but I have to run now."= he is not ready for a serious relationship just now " job my whole life" = he is telling you he wants to concentrate on his career " I have never felt both so in awe of [ means to admire] and so protective, around a girl as I do around you"= there is a good possibility of a serious relationship because he admires you, but only once he has his career in place My advice is to keep the relationship casual for now. Go out with other guys as well.