"completely confide in them" after a few months? Huh... I'd suggest being honest about the day you're living, and keep it simple. For example, if you're feeling down, say I'm feeling down today. If you feel happy and content, say I'm feeling happy and content today. If you're grumpy, say I'm feeling grumpy today. If you don't feel like getting out of bed, say I don't feel like getting out of bed today. If they want to know what's making you feel happy or down or whatever, tell them if you know and are comfortable sharing (especially if they're making you feel good!). If you don't know, say I don't know, nothing I can pinpoint. If there's something affecting your mood and you don't want to share, you can choose not to interact with them that day.