Real Hurt ..Am I Right For Feeling This Way?

My boyfriend(well not anymore) cheated on me when i was away. A girl from his work came over got drunk and gave him a handjob. He told me the next day, and ive never had something hurt so much. i feel like our 2 year relationship meant nothing and the love i knew was fake. im soo hurt, if you love someone you wouldnt do that.