Love Advice

Let me preface this by saying I have never had a crush or been in love. There is this boy who is a senior and I'm a sophomore in high school. I think I may have a crush on him. I consider him one of my best friends, but every time I spend a day with him I get these feelings of nervousness and extreme sadness at the thought of him ever leaving and just being around him. Whenever our hands accidentally touch I get these butterflies in my stomach. I think constantly about what it would be like to live the rest of my life with him. Does it sound like I am in Love? How can I tell him without ruining our friendship and making it awkward? Am I just an overly hormonal teen or are these actual feelings? I have never felt this way before! PLEASE HELP eve COMMUNITY!