My guess is that you're not picking up on some really important cues, or you're hitting on people in situations that aren't normal to begin with. That's an area you really have to be careful about, and if you're not sure what you're doing wrong, it may be best not to do it until you find some way to figure it out. Because you could land in far worse trouble than this if you freaked out the wrong person.
One thing to remember is that women have to be prepared at all times to deal with creepy men who might try to rape us. So we have to be extra-cautious about things that might seem little to other people. And if even the outermost boundaries are crossed in the wrong way, we have to learn to defend ourselves or get out of there. (Autistic women often have an almost opposite problem, where we have trouble discerning when that boundary is being crossed, or knowing when to act on it, so we end up assaulted and raped more often than nonautistic women. If we survive, some of us learn caution.)
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"In my world it's a place of patterns and feel. In my world it's a haven for what is real. It's my world, nobody can steal it, but people like me, we live in the shadows." -Donna Williams