God is reliable. He does what He says, and He delivers on His promises. How many of us can say that? We make promises in our wedding vows, to our families, to customers and we still let everyone of them down. But through Christ and before, God has never let a promise go undone. There may be a few that has not been fullfilled yet, but you can trust that they will.
We expect reliability in a car, a dog, and maybe in that old refridgerator, but sooner or later, they break down or die. God will never let that happen. His promises are true. His words are reliable for every stage of our life. The Bible is full of God's reliability. He saved the Israelites and called them His people. He helped King David, and his descendents as they reigned. He promised us a Savior and through God's love, Jesus is that person.
Never doubt God's love for you. He made these promises with you in mind. He gave you the choice to accept Christ or spurn him. If you love Jesus and obey God's commands, His love for you will always be there. I promise. John 16:27 says 'No, the Father himself loves you because you have loved me and have believed that I came from God.'
Jesus tells us that he loves us time and time again. His word is totally pure and reliable. We need to remember that the next time we make a promise we don't intend to keep. Maybe our reliability will increase.