You should avoid seeing people who've hurt you.
Gary wants to go to the grocery store but his ex shops there too.
Gary wants to obtain food from the grocery store.
Gary decides to order his food from the store online over the internet.
Gary simply goes to the store and figures that they can't possibly run into each other.
The store delivers the food to Gary and there's no chance he'll see his ex.
Gary runs into his ex at the grocery store, and he's shocked.