First date 😯😯😶How can I make myself look older?....

So, currently I'm getting over a break up with my 17 year old ex. He recently left me for a 6 feet tall girl with 2 kids. (She looks about 25) There isn't nothing wrong with being tall but it did hurt me a lot, so now it's been 5 days since we broke up. It still hurts a lot so I'm not trying to rush anything, however there is a guy that's been trying to get my Attention he's so sweet and attractive. He's a little darker than what I'd usually go for, he has gold teeth and tattoos. He's very independent and put together. Here's the catch he's 20 years old But he's trying to take me out on a date this Friday or some time this week, but he does know that I'm 16. I'm so freaking skinny you guys, I'm only 90 pounds I'm so so worried about him not being attracted to me when we get in person because of the fact I'm literally all bones and us looking akward together. I mean people have told me I look a lot older than 16 because of the way I do my makeup but my body shape says otherwise. How exactly can make myself look older? Am I over reacting about the situation? Tell me about your first date experiences.