<human>: Give me the gist of the text in a nutshell

I have been dating my boyfriend since January and it has been the best relationship each of us has had so far. We were very happy, everything seemed just working out perfectly, it started naturally and everything felt just right. We both are in professional school and despite the stress we somehow made it work. I knew at the beginning that he was supposed to leave for 10 months after graduation and we agreed to wait and see if we are going to do long distance once time comes.

However, recently I noticed he was acting distant and cold, and kind of annoyed with me. Anyway, yesterday he barely kissed me good night and was very cold (I have pretty sarcastic side but he seemed to like it, however yesterday he was annoyed and offended by my jokes, but I was just joking) so I talked to him today. He is going to be away for 4 days and I asked whether he needs some space so I won't text him. He said that he has been stressed lately and needs space for the weekend. 

I told him that he can take his time and I am there for him if he needs me, I was just worried for him. He thanked me and that was it.

I am so hurt and confused. I don't know if this is a pre-breakup step and that uncertainty is killing me. I am going no contact and I guess my question is what does wanting space implies? Have you guys ever done that without having a break up in mind? Should I consider our relationship over? 

Thanks.
<bot>: Boyfriend of 4 months wants space. I am hurt and confused. Our relationship seemed almost perfect. What does wanting space implies? Have you guys ever done that without having a break up in mind? Should I consider our relationship over?