5 months old! Ain't nothing holding me back!

Will is 5 months old today. It is so crazy how time flies. He is getting so big and doing fun new things all the time. He is getting pretty good at sitting. He still loses his balance if he tries to reach too far for something, but he sat by himself for about a minute the other day! I can't wait until he can sit on his own and we can play more. I am pretty sure that he will be getting a new tooth soon. His gums don't feel hard yet, but he bites on everything and is drooling even more than usual. Plus he has all of sudden decided that sleep is not for him anymore. OH JOY!!! I am so frustrated because he was doing so well, he even slept thru the night a couple of times. However, now he wakes up a couple of times, which I guess really wouldn't be that bad except he doesn't want to go back to sleep! Normally he would get sleepy or fall asleep while eating and I could just put him in bed and then go back to bed myself. But oh no, not now! Now the minute his head hits the pillow he is WIDE awake! (And yes, I did say pillow. He is sleeping on the boppy because otherwise he rolls over in the night and cries because he doesn't want to be on his tummy!) 
Anyway, here is a picture that I took today before we went on a walk. He is so darn cute!