Friendship to a married woman is nothing wrong and i do not see any problem provided that your intention is purely friendship.Once you give a deeper meaning on it it and let your emotions out of control thats' the time that your crossing the borderline and playing in a dangerous grounds.Nonetheless,the benefit is having a friend to share with your happiness,someone to talk to in times of loneliness and gaining more friends from your friends circle of friends.Go Buddy...no risk at all..