Should I sleep with an older guy?

I'm a 20-year-old woman, and I've known an older guy, who is 52, that I work with for about 8 months. At first, everything was innocent, and he was really nice to me. About a month ago, I gave him my Instagram, and since then we’ve been texting almost every day. He’s still sweet, but things have become more sexual. I see him a lot at work, and he flirts with me a lot. The way he looks at me and talks to me is really exciting, and I find myself thinking about him all day. I'm wondering if this is a good idea. Does it make me strange?