Can't Stop Smiling Today......

So I have this weird thing happening...I keep smiling like an idiot all day. It's not because of anything big or amazing...just little moments with my family and friends are making me feel so happy. Like when my sister makes a silly joke at dinner...or when my brother helps me figure out a homework problem without even being asked. It feels like these small things are the biggest deal in the world right now.... Is it normal to get this giddy over everyday stuff? Do other people feel like this too sometimes? Or am I just going crazy with happiness?.....