I need relationship help!

Ok, so I started liking a girl in my class and a couple of my friends found out because I suck at hiding things and I just found out that she's Mormon and neither of us are quite at 16 yet. I also don't know her very well and just don't know what to do. The likelihood of it ever working out between us is next to nothing. Should I save myself.from the pain and try and move on or do something else. I'm not one that can usually move on. Just please I need help, I don't know what to do.