I am 18 years old girl. Is that allright if I say "I love you" to my brother's friend. I sometimes feel so depressed because I'm afraid he will have a girl friend before I do so.

Now he rarely come to my house. I'm really sad! But whenever he comes, I just can't smile at him. I can't even breath. He has a beautiful smile. He smiled at me many times, he also promised to go out with me when I am sad. He knew I like him, but he didn't know that I can't get him out of my head.
Now I don't know how to express my love to him. What if he takes me as his younger sister. I can't contact him, my brother doesn't want to help me.

... Now I am looking for a chance to meet him, to say that I love him.
I am tired of doing nothing.
Let me out and I will do the right thing.