Super nervous!

Sadie
So I met this guy my freshman year of high school (Id be a senior in college now) we used to talk every single day for years and I used to call him my "big brother" although he hated it when I called him that because we always had a thing for each other. We know a lot about each other and at one point I could call him my best friend. I might see him today for the first time in years! He told me that he used to be crazy about me and that he thinks I'm beautiful. I'm just super intimidated because he's three years older than me, and I want something to happen but I've never done it with an older guy before. Advice ladies? How can I impress him without going overboard?