Part of having a social life then would also be that the person YOU have a crush on isn't interested in you & you have to LEARN how to not be humiliated by it. Like you said, it's all part of having a social life, nothing to be humiliated about. Maybe that girl is more interested in your friend who is showing her interest & just not interested in you & doesn't want you to think that she is. Maybe she's afraid that if she shows more kindness to you that you might take it the wrong way as her having an interest in you rather than just being a nice person & just doesn't want to take that chance of having to deal with that problem. Sadly, that happens in social environments when the girl feels that the guy may not have the social skills to understand the difference.