There is a loving all-powerful and just God, and he has created a standard for each of us to live by.
Jesus replied: " 'Love the Lord your God with all your heart and with all your soul and with all your mind.' This is the first and greatest commandment.
And the second is like it: 'Love your neighbor as yourself.' All the Law and the Prophets hang on these two commandments." Matthew 22:37-40
Jesus loves you, and He wants you to have a personal relationship with Him. The problem is that sin (failing to keep God's law) separates us from God. You see, God's expectation is that all of us follow His "Law of love", and anyone who is honest must admit to not fulfilling it perfectly. God says that every person that has ever lived is a sinner, and any sin separates us from God. That includes me, and that includes you.