I have read so many threads about CDers are afraid to come out and tell the people they love. I do know this can be hard and you don't have to tell all of them, but the weight lifted off your shoulders is so great you won't believe it. This is something that is a part of you or is you. You are really only hurting yourself and others by not being yourself. You really need to release yourself from you mind prison and live your life.
I have just read a thread where a CDers just told his SO and she accepted him. Many time, not all the time this will be the reaction. But the thing is you have no Idea what kind of relief you can feel by coming clean about it. If you are holding or hiding things from your SO, they know something is going on. You really need to free Yourself and be Yourself.
If your SO really LOVEs you then they should stay with you no matter what. I had a counselor the other day explain it like this to my Lady. She told her that if I were to grow a large lump on my back or if I contracted a cancer, would she leave me. My Lady said it was not the same, but the counselor said it is the same and that if she really LOVEs me that it should not matter.
Chances are that if your SO is going to leave you when you tell them, then they were probably going to leave you when they found out someday anyway. You need to talk to them and let them know how you really feel and who you really are.