Why are there so many denominations within Christianity that say they are right in their interpretation of the Bible? Who can I believe?

   Yes, there are many.  Our focus is always to be the Lord Jesus Christ and His Word.  "For God so loved the world, that He gave His only begotten Son, that whosoever believes in Him should not perish but have everlasting life” (John 3:16).  The word "believe" means one who adheres to the teachings of another.  We must follow Christ and develop a personal relationship with Him.  God works with people on an individual basis.  "Behold I stand at the door, and knock: if any man hear my voice and open the door, I will come into him and will sup with him, and he with Me” (Revelation 3:20).  Church affiliation, membership, mom and dad, or head knowledge of the Bible cannot guarantee any type of relationship with God or save you.  We will all stand before God individually and give an account for ourselves.  Jesus said, "The time is fulfilled and the kingdom of God is at hand: Repent, and believe the Gospel” (Mark. 1:14-15).  God desires unity in His church.  Jesus said, a house that is divided (Matthew 12:25) cannot stand!

    Within the denominational structure there are those who are serving God.  There are many fine churches.  Each city or region consists of one church involved in varying denominations.  The Bible says not to forsake the assembling of yourselves (Hebrews 10:25).  We need each other as God has a universal church body that is designed to work together.  "This people draws nigh unto me with their mouth, and honors me with their lips; but their heart is far from me. But in vain do they worship me, teaching for doctrines the commandments of men” (Matthew 15:8-9).  His word must be obeyed.  God is moving across denominational barriers now in these last days.  Each church has its own flavor. Connect into a local church that will enable you to grow and be encouraged.  Pray that God would lead you to people who love the Lord and always follow Jesus Christ and His Word.