What would you do if your friend is inlove with a playboy?  

Tell him the issues. Accepted / not, it's not your problem. One's fate is determined by one's own.

This is a bit of a sticky situation. Well, as a concerned friend, you can caution her or warn her but you can only do so much because in the end, your friend is the one who is going to make choices for herself. A suggestion wouldn't hurt.

As for friends who get angry with that stuff, I wouldn't be friends with people who are narrow minded.

hi friend,love is blind,so its all once own decision,warn your friends,but don't force them,since no one like forcing some thing to do.for this reason don't break your friendship.

I've been in a similar situation except I was the one going after the so-called playboy. For me it was a question of do I tell my friends and endure the potential lectures of concern about his unworthiness or just go after him on my own time and leave them out of it as much as possible. I ended up going after the guy, didn't really ever get anywhere but I didn't tell my friends. It was just easier that way.

i would actually open up to her that she is the kind of girl who's worth loving for..
just speak to her honestly and it's up to her if she'll gonna take your advice..But always maintain your friendship..Someday, she will realize that you're right...

being a friend doesn't mean you can control her life. You can warn her, but you cannot force her to do anything. It's too bad, but her life is her decision. What you can do for her as a friend, is just stand by until the relationship breaks off, and be there for her when she comes running to you for comfort. Maybe then, she will listen to you in the future. Let life itself teach her what's good and what's bad, if she doesn't want to listen to good advice.

As a friend, you always make sure that your friend should not hurt at all times, especially when it comes to love. Love is blind and remember we cannot thought such person who and which she is going to love.
Being a friend, what you can do is listen to her problems and issues and advice her on everything that she can do. Its really up to her if she will accept that or not. Its her life anyway, so she has all the control of it :)

"...i don't wanna end like it was before."
As for me, I will have to deal with it. She is inlove with that playboy, so be it! Respect her decisions. Later on,no matter what happened, she will realize she will end up being with you, her true friend, that never give up on her and is still there no matter what!