No, God hasn't turned His back on you. He loves you and wants you to bring your burdens and cares to Him in prayer. The Bible says, "Do not be anxious about anything, but in everything, by prayer and petition, with thanksgiving, present your requests to God" (Philippians 4:6).
Only two things can keep God from giving us what we ask for in our prayers. The first is sin - and the reason is because sin erects a barrier between us and God. Until that barrier is torn down, God can't answer our prayers. The Bible says, "The Lord is far from the wicked but he hears the prayer of the righteous" (Proverbs 15:29). This is why the first step you need to take is to turn by faith to Jesus Christ and ask Him to forgive your sins and come into your life. When we do that, the barrier of sin is removed - and God hears our prayers.
The second thing that keeps God from giving us what we ask for is if we are seeking something that isn't His will. God loves us and knows what is best for us - and because of this, He won't give us anything that isn't His will. The Bible says, "This is the confidence we have in approaching God: that if we ask anything according to his will, he hears us" (1 John 5:14).