Ephesians 3
14For this reason I kneel before the Father, 15from whom his whole family in heaven and on earth derives its name. 16I pray that out of his glorious riches he may strengthen you with power through his Spirit in your inner being, 17so that Christ may dwell in your hearts through faith. And I pray that you, being rooted and established in love, 18may have power, together with all the saints, to grasp how wide and long and high and deep is the love of Christ, 19and to know this love that surpasses knowledge--that you may be filled to the measure of all the fullness of God. 
20Now to him who is able to do immeasurably more than all we ask or imagine, according to his power that is at work within us, 21to him be glory in the church and in Christ Jesus throughout all generations, for ever and ever! Amen. 
God wants us to be happy, but we suffer for our own good. God did not create suffering or pain. He created free choice so that we may expeirience real love. When he gave us free choice we chose suffering. God created us to be happy, as C.S. Lewis said: God whispers to us in our pleasures, speaks to us in our conscience, but shouts in our pains: It is His megaphone to rouse a deaf world He is saying that God knows there is pain and that it will shape us into better people. The only way we can expeirience real love and real happiness is by expeiriencing pain. I hope this will help you.