19yr dating 27yr? 😬❤️

So I’ve met this guy who I really like, we’ve been talking for 5 months now consistently and we started to fall for each other. He told me his feelings for me and he mentioned me to his mom and sisters, I just don’t know how to tell my mom 😬 he keeps pressuring me to tell her so she knows what’s going on. I’m more so nervous because she might think he’s to old for me, but he doesn’t act or look his age at all I’ve mistaken him for 22 when we first met that’s how young he looks, recently my mom told me when she was 18 my dad was 8 years older then her 🤷🏾‍♀️ his age doesn’t bother me it’s just telling my mom about it, I wanna be completely honest with her and make her understand. He makes me happy and I really like him.

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EDIT: what I mean by “he doesn’t act his age” means, just because he’s 27 doesn’t mean he’s a creepy pervert 😭😂” he’s still kinda young and I’m okay with his age. He’s really mature and smart as well.