If you don't think you should tell your parents, then don't, at least not for now. The point at which you should tell them is when it becomes something that you know, instinctively, that holding back the secret is no longer an option. At the moment it sounds that you don't feel any need to share it. Under those circumstances it might be best not to.
Coming out can be a difficult time for all concerned. When you feel that you need to, don't let the fear of how hard it might be hold you back from coming out, but to end where I started, you don't seem to "need" to. So I don't think you should. But only you will know whether you should come out or not.