How to come out as a crossdresser to my family?

Im a male who has been wearing womans clothes for about 3 to 4 years without any family knowing... i really like wearing leggings, with a nice pair of flats or nikes...(Heels occasionally)! I want to tell everyone so i can do it freely and not worry about being caught anymore. I already do it publicly but in fear someone will see me and snap a photo! Please help!!! I need to know some options?
How to come out as a crossdresser to my family?
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