It is very very difficult to tell. Most of the time an overuse of the smiley face =) will give it away, but there are a lot of girls out there who use the smiley face a lot in all the text messages they send to people.
If you want to tell if someone likes you, try being more observant when you are with them in person and look for signs.
tell them to get over you and date someone else.
if he stares at you and tell to someone he likes me or tell me he likes me
You can tell if she uses lovely words in such messages. That is one part of it, if she goes ahead to fulfill what she has written about is a complete proof of her love.
Blondies aren't any different than other people. If you can tell when someone else likes you then you can tell when the blondie likes you
you can tell by their face.
If u find a change in someone's behaviour
they'll flirt with you
Tell him
Ask them or failing that waterboarding
Ask her.
You can never tell for sure, but if he messages you every single time you are online it means he wants to talk to you. That is a good indication that he likes you.
Then tell that person if she likes you or just leave as is