Not sure how to fee

It would take forever to talk about before and after the break up. Id like to just summarize how I feel and what Ive went through. I dated this girl between one or two years. Things were amazing. We had so much in common, I liked everything about her, and I loved her. Awhile before the break up, shes been acting odd. She became distant, she didnt have much time for me anymore, and each time we would hang out she would be on her phone. I would place her phone away and kindly let her know that I would love to talk to her about whatever since we were hanging out. She always claimed that it didnt matter because she was in love and could talk to me as she used her phone. I didnt want to think to much of it. It lasted two weeks before the last day of school occurred. I got myself all cleaned up and dressed nicely mainly for my girlfriend at the time. I show up and expect to see her where she would always meet me up but never did and I felt stood up. I go home and realize she didnt show up to school. Only awhile later, I get a message letting me know that she wasnt happy in the relationship. It hurt me so bad because I literally tried my best in being the best boyfriend that I can for her. I gave up so many things and time to be with her. It also hurt because it sounded like she practically said that she lied to me all this time about loving me. She claimed she never lied to and its not my fault but she just been going through things which I doubt sadly.