Yes 100%, keeping positivity in your life is definitely a hard thing to do in today's day and age. There's a lot more talk and attention about it now though than a few years ago, so at least there's that.
It's hard to get out of our own heads sometimes, once negativity is let in it's hard to get rid of it.
But, like you said positivity passes to the people around you.
If you can't stop being your own enemy it helps to surround yourself with positive people. And hope that some of their positivity can rub off on you.