Help shes making me feel ackward?

one of my roommates said she saw the guy i was dating with this girl and they were holding hands... when i confronted him he said he did not hold any girls hand after he worked out, he said he did walk with one of the girls he knows but they were just walking and thats the truth while looking me in the eye...she today lashed out at me because i asked him if he held the girls hand... and said she is telling the truth...they both say they are telling the truth grrrrr... then she says imma see if kara saw it.. then tell you hmmmm