How do I not be so awkward around my friends?

I’ve known these friends since school started, and have gotten closer, but I still feel like the odd one out.

They have been best friends since elementary, so they know each other really well, and me, being the one who just met them, dont…

They talk about many things..like TV shows for one…which I dont watch much of, so I cant talk about it…
then when they talk about other stuff, I feel really awkward (I know its only as awkward as I make it…but still), and dont really talk much. Then, sometimes, they would notice that I havnt said anything, and they would all turn to me, and ask “so, hows your life going?” or something like that….what am I supposed to answer? “good” and sit back silently? heh. I dont know, I really like them, and they are really cool people, but I just dont know how to talk to them.