Things Neglected, People Forgotten

Nowadays so sad. Everyday work, go home, feed dog, settle Petedge things and my bf not free to even talk to me or msg me. Very disappointing. I dont remember me ignoring him for one year when I was in school. I dont remember giving him the cold shoulder even during my own exams, which I doubt are less important than his normal day revision. I dont remember ignoring him completely when he needs my help, support and consolation.
I forgot to bring my hp again today. Then I called him in the afternoon, not wanting to disturb him during morning lecture and not wanting him to worry although he kept casting me aside and ignoring me these few days. Then he said he didnt msg me. Neither did he remember my office phone number. Neither did he sound very happy when hearing my voice. Instead he sounded like I should get off his back as fast as possible.
This is really sad. I dont believe and I dont understand why one can give his loved one cold shoulder and appear to forget her altogether. I dont think a person can be so busy that he cant balance his life. Or maybe I am expandable. In that case, I dont think there will be a need for me to bring my hp to work anymore.
Is it because I love him so much unknowingly deep inside, that each morning when I wake up, the love renews my faith for him and I still have hope? Yet each day, hour after another, it wanes until I find it so unbearable and so painful I cant work anymore. I'll stop to think. I want to lose hope. I want to cast these hope away so that I wont have to day after day, be disappointed over and over again. I dont want to build up anymore hope. Each day, you act like nothing great happened. Oblivious to my pain.
A relationship needs to be sustained. Are you so busy that you cannot sustain our relationship anymore?