SHOULD I TELL THIS TO MY HUSBAND AND PARENTS?

I am lidia,an18 years old married girl.Today there was a night party in my home and many of our relations came to participate.My husband is in his working place and he left me after our marriage with in a month.Ours was a love marriage and its for 5 months we are living separate.And now for four days he hadn't talk with me .Bcz when a guy wave his hand i replied hai,and after that,that boy began to give me flyng kiss and to talk with me.After that incident my husband scold me a lot.But i said sorry and cried a lot.But he didn't call me yet,and yesterday i called to his office and that time too we were quarelling.Because of thinking my husband i didn't attend the party and stayed alone in my room.When i was taking a nap i felt someone touching my breast.Then i opened my eyes and i saw one of my cousin sitting near my bed.He told me that he was checking i was sleeping or not.Then he began to talk about my husband.I dont feel any interest in his talk,he was looking top to bottom in my body whole the time.I told i want to sleep and suddenly he hugged me and pushed me back to bed.He lay on me and pressed my breast and kissed on my lips.Now there have an injury.It was really a shock for me and i couldn't do anything.My cousin is elder than me for 5 years.If i tell this to my husband i dont know how will he respond or if i tell this to my parents there will happen problems in my family and relations.I dont want to make any problems.But i want to give him punishment,or if i dont do anything he will do again.What can i do now?Why its all happening in my life?If my husband is near me it will never happen?How could i hide this from my husband,i didnt hide anything yet from him.What should i do now?