first unless its a real name dating service there no real way to know. so lets say it is. No beating around the bush you sit down put your arm around the mans shoulder that you love. and simply say im not good enough for you anymore that you need to go to a dating service. but say it very calmly give the man you love a chance to explain. he might have a good reason to be there, talk to him and find out the reason maybe your part of the blame maybe you take hiom for granite, make by the sparks not there anymore but togher if your both willing to try you can get that spark back because it all comes from lack of communacation. So always talk to each other love your love like you want to be loved. Dont pry dont try to undermine him go to the source of the matter an talk.