I really like him, help needed!?

I met this guy a few months ago, and we're getting to become really good friends, despite the fact I have a huge crush on him. I've hung out at his house with his friends, and I would catch him smiling at me a lot, and when he spoke to everyone as a group, he would look directly at me, smiling. I am hoping so much that he likes me, but I wanted to flirt with him, as subtly as I can get away with. I should hopefully be meeting up, just me and him next week, but he makes me really nervous and I don't know what to do!