The great thing about being creepy is that you'll know if you're being creepy. Because you'll suddenly be all alone. Women in particular can spot a creep a mile away. As for guys, if you're coming on too strong and they're not interested, they'll let you know by seeming distracted or looking for excuse to get out of the conversation. Unless they're drunk and it's 2am and the bar is empty. I'm KIDDING of course.
The trick is to just be yourself. But what if you're not usually confident, you say? That's when you maybe up your game by about 20%. Be friendly, funny, and a little mysterious without seeming rude or aloof. Listen, ask questions, offer interesting things about yourself while still keeping a bit of mystery. Be normal basically. If there are sparks, those will happen over the course of hanging out. Just be confident without being overly cocky or braggy. That's a one-way ticket to creep. If you're a guy, again, relax and don't be threatening. Play it cool, and don't be aggressive. Give her space. Let her come to you. Hopefully your normal demeanor is not that of a creep. So just be chill.
Well, that's depressing!!
I feel if you pay attention to her body language and how she responds you'll get signals the whole time of how far and how fast you can go. Each woman is different. Start with some casual touching to test the waters. Touch her arm, her hand, the low of her back, her leg and see if she is receptive. She'll move away if she is not interested. Also is she leaning forward and maintaining eye contact? Keep upping how often you touch. Leave your leg leaning against hers under a table. If she leaves it there she is interested if she pulls it away probably not. Try holding her hand at some point, same thing. A woman will be receptive if she is interested. Women really only tend to think men are creepy when she isn't interested. I know if I am interested but a guy is moving too fast, I will slow his advances down but still be receptive to them. Just pay attention and you'll be fine.