There are many verses in the bible that point to God's plan on your life and your need to trust in Him.  Jeremiah 29 verse 11 states, "For I know the plans I have for you," declares the LORD, "plans to prosper you and not to harm you, plans to give you hope and a future." Jeremiah was considered a prophet, meaning that he heard from God and spoke the words of God to the people. Jeremiah was speaking in this case to the exiles from Israel, declaring the promises that God had for his people and to the future that God had planned for them, to eventually return them from exile. Similarly you can take this verse and apply it to your own life.  If you believe God made you and has a plan for your future, as declared here, you are able to trust in God and His word and the promise made to you here. In terms of trusting in this promise Proverbs three verses five and six tell us to, "Trust in the LORD with all your heart and lean not on your own understanding; in all your ways submit to him, and he will make your paths straight." Here we learn that our own wisdom and understanding of our circumstances is limited to our own human experience of life. But God has a plan, and he is able to see your future, his understanding is greater because he knows your future. Therefore the bible says it is important to trust God, who has planned your future, with full understanding of what that means. If God has promised that He 'has plans to prosper you' as stated above, then trusting in what God says will bring 'straight paths' as Proverbs states above also.

Jeremiah 29:10-14 from the Message:
"...I'll show up and take care of you as I promised and bring you back home. I know what I'm doing. I have it all planned out-- plans to take care of you, not abandon you, plans to give you the future you hope for.

When you call on me, when you come and pray to me, I'll listen.

When you come looking for me, you'll find me. Yes, when you get serious about finding me and want it more than anything else, I'll make sure you won't be disappointed." God's decree. "I'll turn things around for you..."

A man’s heart plans his way, but the Lord directs his steps. (Proverbs 16:9)
The steps of a good man are ordered by the Lord ... (Psalm 37:23)
I will instruct you and teach you in the way should go; I will guide you with My eye. (Psalm 32:8)  
The Lord will guide you continually ... (Isaiah 58:11)
Delight yourself also in the Lord, and He shall give you the desires of your heart. Commit your way to the Lord, trust also in Him, and He shall bring it to pass ... Rest in the Lord, and wait patiently for Him. (Psalm 37:4,7)

There are loads of them.Have you heard about 'Gods Love Letter?'It is a collection of the most inspiring verses in the Bible.It is the perfect thing to give to a Christian who is worried about what Gods plan is.It contains many beautiful verses,and they all show that God has a plan for everything.You can find it here www.matmice.com/home/godslove2007.Do you like it?I suggest you copy it into a word document and decorate it nicely and print it out and give it to your friend.Its sure to make him feel better!Ps.I see you posted this back in May.Sorry I didn't see it earlier.I hope your still around.

¹¹ For I know the plans I have for you,” declares the Lord, “plans to prosper you and not to harm you, plans to give you hope and a future. ¹² Then you will call upon me and come and pray to me, and I will listen to you. ¹³ You will seek me and find me when you seek me with all your heart. ¹⁴ I will be found by you,” declares the Lord,

OOh, there are lots of them..lets see:

Proverbs chapter 3: Verses 5 and 6
Matthew Chapter 6: Verses 19  all the way down to 34.  I love this one, Jesus said these words himself.  
There are lots in Ephesians too...one that says: Do not be anxious over anything but by prayer and supplication make your petitions known to God and the peace of God that excels all power will guard your heart and mental powers by means of Christ Jesus..but I can't remember where exactly to find that one..phil. 4: 6, 7?

John 17:20

I came so that you might have life and have it more abundantly. You were fearfully and wonderfully made. Come boldly to the throne of God so that you may obtain mercy. For he gave his only begotten son that whosoever believeth in me shall not perish but have everlasting life. There is LIFE AFTER DEATH. I promise you.
God is merciful, abounding in goodness. He is faith and just for forgive us of our sins and cleanse us from all unrighteousness.

You need god In your life!

2 peter 1:3. Look it up. Its amazing!

Jeremia9h 29 11 or 12, I know the plans I have for you, plans for you to prosper and not to harm you.

Titus 1:2

In hope of eternal life, which God, that cannot lie, promised before the world began;

I am also going through a difficult time in my life. James 1:2-8 gives me hope, maybe it will help your friend as well. You are both being prayed for.

Proverb 3:5-6 Trust in the LORD with all your heart and lean not on your own understanding. In all your ways acknowledge Him and He will direct your paths.
Jeremiah 29:11 For I know the plans I have for you says the LORD. Plans to prosper you and not to harm you. Plans to give you a hope and a future.
Matthew 6:33 Seek first the kingdom of GOD and His righteousness and all these things will be given to you as well.
Philippians 4:13 I can do all things through CHRIST Who gives me strength.
Philippians 4:19: And my GOD will meet all your needs according to His glorious riches in CHRIST JESUS.
Please read Romans chapter 8 start at vs 28 and read through the end of the chapter.
GOD bless your friend and GOD bless you for caring about her.

Proverbs 3:5 (New International Version)

5 Trust in the LORD with all your heart
  and lean not on your own understanding
Jeremiah 29:11
*For I know the plans I have for you," declares the LORD, "plans to prosper you and not to harm you, plans to give you hope and a future

Numbers 31:17, 18. Is all you need to understand God's love.

"Believe on the Lord Jesus Christ and you shall be saved".
So easy and simple, a cave man can do it.