sleeplessness

So dude says to me yesterday, he's concerned with my lack of sleep, and thinks/feels that it is having a negative impact on our relationship. he thinks i snap at him and react negatively because i am not sleeping well.
first of all - i snap because i am provoked. i do not snap for no reason.
example a) we were walking home from the movies, (we were irritated during the movie several times by people using their phones and ranted about that for a while during our walk) my friend charlie made a comment referencing a song that i did not catch. and chris mockingly teased "oh you music snobs" or something to that effect. meanwhile, he had made a comment to what i thought was similar about the artist previously referenced to just a few hours earlier, so i called him on it. he said i was jumping up his ass and that i had a lot of anger. so i said "it's because i eat the dreams of small children as they sleep" - a quote from the movie we had just seen that we both thought was funny. i thought we were joking and playing around. apparently we weren't b/c he didn't talk to me for the rest of that night and brought this up last nite.
example b) we went to the movies again yesterday, and during the movie were a bit irritated by the old people wandering around the theatre, and talking during the movie, and ranted about that. it was very crowded and people were stepping all in front of us not looking where they were going...2 small children running and screaming nearly stepped on my bare toes so i jumped, wondered who they belonged to and asked if we could shift over a bit while we talked about the movie we had just seen. and we did. he's done that to me before - asked me to move over so we could walk more comfortably - i didn't think it was a big deal for me to ask the same of him. apparently it was, because of what he brought up later last nite.
this is something i've never understood - how MY reaction to something, no matter how similar it may be to another persons' can be mistaken and misunderstood.
and how, when confronted - i cannot react as if i am being attacked because i'm told i'm not being attacked. he said he's telling me how he feels, he's not attacking me, he's trying to be constructive and worries about me, and i'm hurting his feelings when i snap at him.
and if i try to explain, i feel like i am then being combative or too defensive.
i argue to specific points. this is how i see something, this is how i interpretted it, this is why i responded. i don't try to generalize or make sweeping assumptions during my arguements. so that when someone tells me you ALWAYS do this or that - i can call them on it and say, no, this is the reason i did this, and here is the reason i did that. it has nothing to do with my sleep, or lack thereof.
i don't sleep because i don't like my job
i worry about money
i worry about my relationship
i don't feel like he wants to spend the rest of his life with me
i worry about my cats
i worry that i've become a burden and that me and my little kitten may soon not be welcomed anymore.
i worry that i am not good enough for him
not pretty enough
not talented enough
not sucessful enough
not driven enough