Change did not bring pleasure

It is married six years. We with the husband still have no children. For the last year our relations considerably worsened. The husband obviously to me grew cold. Thus he began to shout at me much more often, than earlier. The last half a year I am looked after by one my colleague. He already many times made a declaration of love and suggested to have sex, but I refused. Considered that after all our difficulties in the relations with the husband the temporary. Recently to us on days off there arrived his friend with the wife. The husband had a bad mood which was strengthened only by alcohol. It many times criticized me, despite presence of strangers...