We don’t love God by dutifully reading our Bible or going to church or giving our tithes and offerings.
Loving God will include these things. We can grow in our love for him by spending time with him in his Word and in prayer and tithing and things like that. However, we can’t think we are loving God if we simply do these things, out of obligation, and at the same time treat others unkindly. We love God by loving each other. Jesus said, if you love me you will obey my commands (John 14:15). That is why Paul and Peter and James and John continually encourage us to never stop growing in our love for others.
There are really only two ways we show our love for God, by loving others and learning to trust him.