I hurt my boyfriend really badly........???What should I do?

Ok so let me start this off by saying I have never seen my boyfriend cry. Not even after his parents' death, sad movies, nothing makes him cry and I've never seen him cry or even close to crying. We are both 25, both have degrees, and good jobs. I am a social worker, and he's a pilot. So we've been together 2 years, and the 2 years have been amazing. He's not your typical nice guy boyfriend. He has a lot of hobbies, and doesn't share them all with me but does his best. He pushes me to be the best I can be and keeps me on my toes. I am not bored of the relationship and even though I think of myself as an independant woman, I miss him a lot sometimes when he's away(he's a pilot). Everything is great except for one thing, his lack of openness. We do talk about feelings(I bring it up all the time and do most of the talking), but when he has problems he doesn't open up and just keeps it inside. I really want to help, but whenever I ask and bug him about it he just says "I'm fine" or "nothing". So a couple nights ago we got into the biggest argument to date over him and his lack of openness and i felt that he liked his hobbies more than me, and we both called each other every name in the book. I was really angry and obviously didn't mean anything I said, but I did say that I didn't love him and never wanted to talk to him again. He said ok then lets end this and leave. So I left, but when I got to my car I noticed I forgot my purse so I went back inside to get it. When I walked back inside to the basement where we were arguing, he wasn't there and I got my purse and walked up. I was tiptoeing the whole time so he wouldn't notice me, but when I got near the door, I could hear him in his room crying. I had never seen him cry and I was really shocked and it was jut a big ball of mixed emotions so I just left because I was so confused and when I got home I caleld my mom and told her and I really wanted to go hold him because I didn't mean what i said but it's been almost 14 days and ive been calling him and texting him but he hasn't been responding. I know he's doing his 4 day work shift, but i feel terrible. i mean he didnt even cry at his parents' funeral but he cried over losing me??? what does this mean? ive been crying all week and i really want to just go and lay there with him but hes not home and he wont even acknowledge my calls or texts(he always cals me when he's landed). for both of us the 2 years means a lot, and by him not calling me does it mean that i valued the relationship more than he did? is he over me? does the 2 years mean nothing at all to him? i know he needs time to cool down but it's been 2 weeks almost already and i cannot get in contact him him!!:(.