Women Like Me by Donna Richards

Front cover states: In the tinsel Hollywood world, only our forbidden, love was real, important - and fatefully doomed.

From the back cover:

It started in a bar, but it wasn't one of those tawdry, sorid affairs of a dyke picking up a femme. It was love - overwhelming, unadulterated tender love. It seized to women and held them in a grip that neither could break. But even in Hollywood, such love affairs are dangerous. And this one was fated for disaster not only by its own 'warped' nature, but by the strangely twisted natures of the two passion haunted women themselves.