It also depends on who you are dating. I am dating a man who has a physical disability so told him about my illness. He likes me still. I am still seeing him after two years. The other men I told who were immature or callous left me in a hurry. But, initially they seemed ok but, of course, were not. Thus, if you like someone a lot and want them to be your friend too, there is no harm in telling them and seeing their reaction. I have not made close connections with people I have not told because I feel I can't confide in them about my personal problems. With lovers who come and go though, there is no reason to divulge. I don't know what the op is seeking but in a good relationship with anybody, trust and acceptance are issues that are important.