Do i have the right to be angry at my boyfriend?

me an my boyfriend have been going out for almost 2 years and we went out for his birthday an he barley touched me or spoke 2 me all nite an then i see him dancing with a nother girl it they werent grinding or any thing it was innocent holding hands but i gt really upset an we had an argument after i didnt care bout them dancing a just cared that all nite i didn't even get a hug am i rite 2 be mad