It could simply mean that he/she is too afraid to say it back. If they are shy or nervous about someone actually liking them. If it is an outgoing person who is usually always with another girl/guy, then they may be trying to find a nicer way to let you know they do not like you back in the same way. Or simply they do not want to respond to you.
RE as in REply.
Is she replying back
It is like a template, you can pre-load your signature (what you would sign a letter with) to save time when replying to emails.
It means telling it like it is.
replying to clear this
Its when you bounce the ball more than once
Usually it would mean he is trying to get turned on/turn you on. BE CAREFUL when replying to this. If you dont like the idea of sexting (or that kind of thing) the i would advise avoiding response.
The phrase 'am no replying back to you' is not a sentence and is not correct grammar.
That you like him
Thank you for your time in replying to the insurance
When someone sends you an email, and you send one back to them, you are replying to their email. If someone says something to you, and you say something back, you are replying to them. See the Related Link below for the dictionary.com definition.
If you mean the content of the mail, you can't. You can only edit a mail by forwarding or replying.