Oh come on! Do you sincerely believe that he did nothing when his proposal was rejected, yet he'd commit suicide [!!!] if some woman stopped speaking to him? Overdramatic much? The OP has got 2 choices in front of her: to maintain such a relationship or to cut it off. Clearly one is in accordance with the shari'ah and the other is not. And yes, the 'non-Muslim advice' may be pleasing to the ears, but it won't be so pleasing in the hereafter.