The original thread OP is talking about is here:
reassurance-of-a-girls-feelings-vt185831.html
In it, another user (Eddie F) gives another angle on it which I think is valid too... Depends on how you do things, really and how smooth you can convey ideas to someone. How confidently you can do it, messaging, etc...
Anyway, in my experience, every girl I have ever actually come out and said I liked, wanted to date, etc hasn't ended well. It's happened many times. Immediately friend-zoned. I'm positive that's been the experience of a lot of guys here.
For me, it was probably what pushed me into making life changes and improvements in the first place. I couldn't figure out what the hell I was doing wrong.
I don't know exactly what it is in a woman's brain, but as soon as you say those words, they tend to eject (maybe if you said them differently? I don't know. I know I've tried several 'versions' of those words many times in the past). I think it has to do with the chase and wanting what she can't have. As soon as you tell her you're into her, the challenge is gone.
How do you SHOW her you like her? I think the most important thing is touching... Kino. Friends don't hold each others' hands when they walk down the street... Kissing is a pretty blatant symbol of "I like you" which you can convey without actually saying the words...
Believe me, they'll get the point that you're interested in being more than friends when you're making out with them. Girls aren't dumb.