Ex bf is bringing his date to places near my house/places we use to go to bump into me. Why is he doing this? How should I react?

Do the places matter to you? Treat them like ordinary things happening to everyone's life. Then think like you are queen above all. Why should all this matter to you? Easy? Isn't it?

stand outside naked

🙄 good god woman you’re nearly in your 30s

Smile, wish him well
He's being a sh*t to you and his date
Be the bigger person

How do you know he's doing it just to spite you?

Go up and say hello in a sarcastic tone and remind him of what you aren’t missing.

Dress in a skin tight red dress and go there with your new date and make out in front of him.

ask if he got over that std he gave you...no, don't do that ,it's mean

The food is good at those places?

Ignore him