First, you need to be comfortable with a few different outcomes, which will avoid the creepfactor.
1. You need to be comfortable with her knowing, and continuing to just be friends
2. You need to be comfortable with no longer being friends
3. You are already comfortable with being more than friends so that's no issue
If you have that attitude, and respect her decision no matter what it is, then you'll be just fine, and she'll probably respect you more as a person, which can only help. Whether it becomes a romantic relationship or not depends on how she feels, so the only way to find out is to talk to her.
If you want to become possessive of her, and "need" her to be with you, then you may come off a bit creepy.
At the end of the day, it sounds like you have a crush on her, and you'll likely get a similar feeling to many more girls over the years, so don't take it too seriously
Also, don't take advice from a bitcoin forum about girls