Why did he say these things?

I been with this guy for about 6 months, we made it a official relationship in the middle of Feb. and things went great. Now all we really do is get into arguments half the time we see each other. We never get to spend time together much though, i complain about not being able to see him much. It pretty much irritates him because he's busy with life responsibilites which i get, i just ask for him to call for a minute before he goes to bed. Last saw him on fathers day and we ended up fighting right before he left because i was irritated that he slept all day till about 3:30pm and he had gone to bed around 10 the night before. I didn't even get to tell him it bothered me because he jumps in all defensive when i tell him whats on my mind. I was up all of friday night/sat morning and the entire day out supporting him for a martial arts tournement he had that saturday, I didn't even get to sleep until we went to bed that night. I know he's tired but he's should also be considerate of how i feel and think to himself for a minute that he shouldn't be sleeping the enitre day almost up until he leaves, we didn't even get to spend quality time together. What pisses me off is he was the one chasing me and telling me he can piture himself with me for 25-50 years, that will be living together early next year when he gets this house with his friend and we'll get a dog or two. Him telling me stuff like that made me think it was okay to act more serious, so i am being serious and in my opinion i think it's mandatory to call me atleast once a day, which he does all up until we have an argument over something, then he goes m.i.a on me then complain about how he's too busy, has serious life responabilities he needs to handle, with work, fixing car and paying insurance, bills, finding a place to live, training and that i am becoming too controlling and demanding and with how i act he'll end up leaving. I don't understand why he needs to treat me like i'm not his girlfriend but doesn't say the damn words "IT'S OVER", so far after arguments he comes back by texting me something like "hi whats up" like it's all fine and dandy, or i end up apologizing just to try and end the fight between us. But I always have to go through hell to get him say anything. I don't understand why he's acting like this. It's like he acts like he wants to leave me but doesn't actually tell me instead kinda just gives me that threat he'll leave but we always just kinda forgive each other and forget about it, but we don't ever really have a talk about setting his needs and my needs, it's just ends up happening all over again. I just feel it's more serious now bcause we haven't seen each other since fathers day and last texted each other arguing on wednesday. It never really lasts this long, only like aboiut 2 or 3 days and then he texts me at some point. He was also in my town on saturday to go to his gym which is about a mile from me and he lives about a half hour to 45 minutes from when i live, and he didn't bother to say anything or come by to possibly talk about things. I am just really torn with how this is turning out, i won't leave him because i know he's a good guy when he doesn't have all this stress on him. Have any of you been in a siutation like this and what is your advice to handle this????