Being on line is a whole new way to have a relationship in the modern world. On the one hand it can encourage much greater superficiality with each other but on the other hand it can hugely intensify how quickly and well you feel you know someone. It is never the same as real life though and I think a common mistake, and one I've made before, is to suppose that it is. You just can't know what it's like to be with the other person in the same room, react to them in the flesh, get a feel of how personally attractive they are to you from on line only and I do think sometimes we react to the intimacy on line and confuse it with the whole experience of knowing someone. I think sometimes we get cyber-carried-away without really meaning to.
Perhaps in the not too distant future, the nearly-real aspect of being on line will be well understood by all users, but until then, it's so easy to construct ourselves in this virtual world, without even seeing it as lying.
One thing I think is impossible to disguise on line is intelligence, a quality that always appeals to me. If you're not intelligent, there are no geek tricks that could make you appear so on line.