Guilty?

I'm not in a good mood right now...Its been awhile actually, but it didn't get better...It started when i called him long after dinner time but there was no answer..i was a little pissed off because i told him to call after he finished dinner with his friends..i thought he must have been spending time in his friend's room or maybe having a party with a bunch of people at the cafe, thats why he took so long to finish his dinner...i mean, how could he be doing that when he doesn't even have like more than 15 minutes to chat with me? it's unfair isn't it? after i finished bathing, he called..i wanted to ignore his calls but i said i'll call him back cause a friend is in my room..after she left, i called for the second time, but again, nobody pick up the phone...like seriously, i thought of asking him "y are u always not there when i wanted to talk to you?' but you see, the first time he didn't pick up was because he was outside busy looking for a perfect birthday present for me, while the second time is because he just got back to his hostel and hence was bathing...i mean, i seriously did not expect him to have spent a whole night just to get me a birthday present..he sounds so stressed up and is trying so hard to resist chatting with me on the phone except when i'm upset...he is definitely doing a boyfriend's responsibility really well..i mean, i did not even get him his birthday present on time when i was just sitting for a 10% selanjar while he did it though its his finals..at times i think he expects too much from me, that i wanted to tell him stop asking for more and just be happy with what i have to give..but then again, is he having expectations beause he actually gave even more in the first place? i'm a horrible girlfriend!