Do i need a psychologist ?

I have not been having the best of relationships with my husband in terms of communication , understanding, caring and sharing ,inspite of knowing him for the past 10 years. not matter how much i convince myself against it, i cant get this feeling out of my head that he cheats on me on and off . i dont think he has any long term affair. its driving me crazy and now its affecting my work . i have left all my hobbies and i dont seem to be abe to keep myself happy for long ...not in his presence although i do try hard at it . work gives me solace . could my gut feeling be true? i know i have got used to his presence and will miss him terribly if we were to break up ,but just cant digest the feeling of being cheated and lied to . i dont know what to do .....