You don't sound like a weirdo at all. You sounds sweet, and it's very cool that you took a chance to reach out to her. However, I don't think she's interested in you romantically...she just doesn't have the nerve to communicate this clearly to you...so she's avoiding you and the awkwardness of it all. Try to not worry about her...do your own thing, continue to be sweet and open and find someone who appreciates all that you are. If you see her on campus, square your shoulders, look her straight on, smile at her and say hello in passing....and keep on walking...you had the confidence to reach out to her initially. She actually sounds a little too immature for you anyway.