meaning of recurring dreams : pop up displays

im 21 years old and a female..i keep having recurring dreams of my boyfriend cheating on me..its never with the same person but i always see him touching or actually perfoming the act with another woman. I dont know whats wrong with, if my dreams are trying to tell me something..I have a very good relationship with him, we've been together for 4 years and although there have been some issues about me trusting him and him flirting with other girls he's never cheated on me. The dreams i have are very realistic and i generally wake up devasted and angry or crying. PLease help him understand what this means as i dream like this almost everyday and usually cant go back to sleep afterwards.