Lied about my age on twitch and now my girlfriend thinks I’m the age I said I was while I stream how do I tell her my real age?

Ok so basically I stream and I thought that the best way to seem more relatable was to be younger. I’m 26 and I said I was 21 and I met my girlfriend through discord in a twitch server. She started watching me and because of that she thinks I’m 21. The thing that makes it worse is that because she’s always thought that I made a whole life around me being born in 2000 instead of 1995. Like I didn’t lie about any of the things that happened to me I just pushed the dates up 5 years. How do you go about telling her my real age? I’m going to meet her for the first time in 2 weeks and like I’m wondering if I should tell her then or if I should keep it to myself. I have no idea what to do or say. Also my girlfriend is 20 she says she likes older guys but I’m so scared of losing her. I have no idea what to do.
Lied about my age on twitch and now my girlfriend thinks I’m the age I said I was while I stream how do I tell her my real age?
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