I have not told many people about my sexuality. This is mainly because I find it hard to define. I associate myself with the words 'bisexual', 'pansexual', 'genderblind'. I am more fussy with men, more likely to seek romance with women, have sexual fantasies involving transgender people.. blah blah spectrum, somewhere on a rainbow etc etc. Recently I have been telling new female partners that I was bisexual (had never heard of the term pansexual at the time) and I found this exhilarating as it was well received every time. I especially enjoyed discussing attractive famous people with a bisexual woman. I really liked having no limits within this discussion and the openness. I do not think I will ever tell my family. This is not because I am worried what they will think. I am sure they would accept and embrace it I just do not feel the need to change the dynamic of the relationships I have with them. Certain friends would probably not understand at all. I think I am fine with leading a double life but is this healthy?
As a fellow mostly closeted bi person, I know exactly what that's like. I plan to tell my family at some point, I just don't really know when or how yet. I think that you should come out to them if it feels right. But, if you feel fine with not letting them know, then you should do that.
Coming out is entirely up to you, I'm not saying you shouldn't but you should only do it for yourself.