Unequally Yoked...

Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness?

And what concord hath Christ with Belial? or what part hath he that believeth with an infidel?

And what agreement hath the temple of God with idols? for ye are the temple of the living God; as God hath said, I will dwell in them, and walk in them; and I will be their God, and they shall be my people.

Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing; and I will receive you.
2 Corinthians 6:14-17

Of course it is good to pray for someone to get saved, but an unsaved person should NOT be a believer's boy/girl-friend to start with. If you want your prayers to be answered you must foremost walk in obedience unto God's word.

The danger to be connected with an unbeliever is that it will weaken your relationship with the Lord and you don't know if he/she ever will accept Jesus Christ as Savior.
This is exactly where Paul warns us for.

You may think that Paul was only referring to "being unequally yoked" in marriage, but that isn't so. Any follower of Christ should not have close relationship or friendship with a unbeliever or wordly person.

This may be considered similar to putting your hand on a hot stove. You'll get burned for sure.

Delight thyself also in the LORD; and he shall give thee the desires of thine heart. In all thy ways acknowledge him, and he shall direct thy paths.
Proverbs 3:5-6

It is not that God doesn't want you to have friends. It is His love that wants to spare you from hurts, heartaches and wasted time. His main concern is that He doesn't want to lose you. You can't serve two Gods.

If you wish to benefit from God's promises, you also have to fulfill the obligations to His word.

My son, attend to my words; incline thine ear unto my sayings.
Let them not depart from thine eyes; keep them in the midst of thine heart.
For they are life unto those that find them, and health to all their flesh.
Keep thy heart with all diligence; for out of it are the issues of life.
Proverbs 4:20-22