Need help! Sure my husband is cheating on me with the so called Co ordinater

RECENTLY I PICKED UP MY HUSBANDS CELL PHONE AND JUST WENT THROUGH HIS BBM CONTACTS...WELL TO MY DISMAY I FOUND OUT THAT HE HAD ADDED THIS WOMEN ON FROM TRAVELS WITH A GROUP OF INDIVIDUAL FROM HIS COMPANY. WHEN I APPROACHED HIM ON THIS HE WENT OFF LIKE I HAVE NEVER SEEN. MY ONLY PROBLEM IN ALL OF THIS IS THAT HE KNOWS I CAN"T DO ANYTHING BECAUSE I AM UNEMPLOYED AND I CURRENTLY DEPEND ON HIM. I HAVE NOWHERE TO GO!