Am I being fair? Is anything really fair?

So he did in fact disappear for an entire week. Left me on delivered. Not even read. 

I know I'm also the first one to say that texting "expectations" or "rules" are stupid, but how is it ok that on Saturday night he comes over, we have sex, and then we talk for hours about silly things while looking into each others eyes, and then he fucking ignores me for almost an entire week. The only reason why he even thought of texting me today being that I saw his best friend and she asked me how things were going and I said "idk". How does that seem fair for me? 

The other important bit of context is that this was midterms week. I understand that, believe me I was also insanely busy, and had to be worried about my school work. Of course. But you cannot tell me that from the 24 hours that each day has, he could not devote 2 minutes to text me back. "Hey, I'm locked in for this week" or "Hey, I have two big midterms, I might be a little faddy" or whatever the fuck his heart desired. 

I am mad, but do I have the right to be so? He texted me the following this morning: 

Heyy u 

Srry I've been so locked in this week 

Miss u 

*kiss face emoji* 

"HEYY U" omfg. That went right through me. Pissed me the fuck off. Heyy u. After a whole week of nothing. I really want to cry and I really feel stupid for even wanting to. We are not dating, I know. I know that. But even so, we are "talking" and he won't even TEXT BACK. For fuck's sake. If what he wants is just the sex, he can also say that. Believe me I'm 20, I'm flexible about this kind of arrangement, but there is no way in hell that I find it ok for him to come hang and pretend to be interested in me in a "let's date" way and the pull this shit. 

I definitely am not asking him to hang out every day, or to even text me every day. but Jesus Fucking Christ, can you at least text me back? 

I can't remember the last time I felt this stupid. God I hate feeling this way. So used, so dirty and so stupid for ever believing that these guys will be any different. They are not. 

Also, maybe it doesn't even matter that much but the fact that he couldn't even text "Sorry" but chose to do "Srry" instead. God.