Be wary of all men you meet online (and offline for that matter!)
I'm sure plenty of them are pleasant and nice, but I have a son so I should know!
Men don't approach girls online because they want a pen-pal. If you are happy with that, then fine.But please don't kid yourself into thinking you are the only girl he is chatting to in this way.
And for heaven's sake don't send any indecent photos over the internet. Next thing you know, you will be tomorrows front page of all the pornography sites!