You know one of the best things about God is that He's not like us. The truth is we as humans aren't really all that faithful even when we try our best to be - and we don't naturally have mercy for one another when people do us wrong and hurt us. By instinct we protect our own interests first but God isn't like this. If He protected His own interests He would have just written us all off a long time ago because we are all broken, fallible and prone to hurt Him over and over again. But He doesn't write us off - instead He opens the doors of mercy to us brand new every day even when we don't deserve it and we often earn quite the opposite. He is also faithful. Extremely faithful. As a matter of fact He is perfectly faithful. He ALWAYS keeps His Word and ALWAYS keeps His promises. In a world of so much uncertainty, He is our certainty. God loves you. You are worth far more than you know.
[ Great is his faithfulness; his mercies begin afresh each morning. - Lamentations 3:23 ]