Posted by Conquest

You definitely should be more reserved than aggressive about it; that is, you like her, but you don't "care". I get weirded out when people make passes at me or have attractions and creep around like snakes or get all up in my face like it's do or die in the relationship. If you respect her, you'll respect yourself, and just let it be; you can make it obvious with time
Sometimes with hormones (it literally doesn't matter what age you are; the flutters affect everyone, so it's not some pre*****cent flaw) we may find it difficult to conceal. I think it's okay to be flirtatious then, and standoffish with such behavior if she doesn't respond or makes it obvious she is uncomfortable.