So how are things going between you and the world these days?
If we are living for Christ then we should not be loved by the world. In fact, we would be hated as per Jesus' own words...
If the world hate you, ye know that it hated me before it hated you.  If ye were of the world, the world would love his own: but because ye are not of the world, but I have chosen you out of the world, therefore the world hateth you. John 15:18-19 These things I have spoken unto you, that in me ye might have peace. In the world ye shall have tribulation: but be of good cheer; I have overcome the world. John 16:33
This really brings to to mind certain celebrity preachers who are loved by so many.
If they preached the true gospel of Christ then the world would want them dead as much as they did Him. After all His message prompted the world to kill Him.
Here is by no means an exhaustive list of what to look for but it's a good starting point in regards to potential friends of the world masquerading as preachers for Christ:
If your pastor cannot be easily reached because he is too busy signing books, touring or his megachurch has minions in place to tend to the little things, such as your problems or concerns then he might be more of a friend of the world, more of a friend of himself, or just flat-out, he might be a heretic.
I can hear the protests now...Stop being so defensive, I said "might be"...
If your pastor celebrity has a star on the Hollywood Walk of Fame, then he might be a heretic.
That should go without saying but many would make excuses for this...
If your pastor preaches that pursuing carnal gratification is protected "Christian liberty" then he is dead wrong and might be a heretic. Well, he would be a heretic...
For, brethren, ye have been called unto liberty; only use not liberty for an occasion to the flesh, but by love serve one another. Galatians 5:13
If your pastor has his church doing all they can to invite the world into the congregation and doing everything feasible to make the world feel "right at home" in the sanctuary then he might be a heretic. Well, he would be a heretic...
The adversary hath spread out his hand upon all her pleasant things: for she hath seen that the heathen entered into her sanctuary, whom thou didst command that they should not enter into thy congregation. Lamentations 1:10
Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness? 2 Corinthians 6:14
I think you should get the point here. Simply put, anyone who is a friend of the world is an enemy of God.
Ye adulterers and adulteresses, know ye not that the friendship of the world is enmity with God? whosoever therefore will be a friend of the world is the enemy of God. James 4:4