Going to keep this relatively short.
I really like this girl. She is the most beautiful girl I have laid my eyes on. I have known her for 5 years and we are in our last week of school together.

We have been talking and hanging out constantly, resulting in my strong feelings for her. I've noticed her staring at me lately & when I notice we stare into each others eyes for about 3-4 seconds. She touches and strokes me very subtly. When we are in a group she only looks at me while she talks & it's just us when we go out.

We're going to the movies at the weekend, and I am going to tell her how I feel. But I'd like to be certain on if she likes me like I like her.

actually i can't really tell. go to the movies and see what will happen. i suggest you to take it easy. not just tell her how you feel. then she might be scared if she doesn't like you, you know.