You can save seeds and grow them again next year.

You will see the seed pods as in the second picture you posted. At some point the pod should turn color to indicate the seeds have matured. That's when you collect them.

https://www.gardeninginthemitten.com/how-and-when-to-harvest-milkweed-seeds/

Yes, two large seed pods.

Here's what your plant hopefully will produce.

https://www.google.com/search?q=asclepias+curassavica+seed+pods&client=firefox-b-1&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjchpSuqOHcAhVOgK0KHYI7B7oQ_AUICigB&biw=1920&bih=938

The nice thing about Asclepius curassavica is it grows very fast from seed. If started indoors, you can get much earlier blooms.