Don't tell them. Establish a nickname that fits you, and live by it.
In the military most guys lie about their name, or what they did. People never knew my real name unless they saw me in uniform. I wasn't called by my "government name" until I was about 28 years old and it felt odd to hear it. From birth to 13 I had one name from the neighborhood I lived in. We moved and I had a new name. I joined the Army and had a new name. I got out, and people would use my real name, and I would tell them "my friends call me BLAH BLAH". I kept relationships compartmentalized. This wasn't something I did consciously, but was a consequence of growing up in bad neighborhoods and limiting the info that you put out there. Damn, I never realized how fucked up this sounds until I typed it out.
In the military most guys lie about their name, or what they did. People never knew my real name unless they saw me in uniform. I wasn't called by my "government name" until I was about 28 years old and it felt odd to hear it. From birth to 13 I had one name from the neighborhood I lived in. We moved and I had a new name. I joined the Army and had a new name. I got out, and people would use my real name, and I would tell them "my friends call me BLAH BLAH". I kept relationships compartmentalized. This wasn't something I did consciously, but was a consequence of growing up in bad neighborhoods and limiting the info that you put out there. Damn, I never realized how fucked up this sounds until I typed it out.
"Feminism is a trade union for ugly women"- Peregrine