As i have become fat, my breasts are saggy. even if i lose weight, they will remain so. is there any way to make them even a little better naturally?

Not on earth: The support structure inside breasts influences how they hang. Such traits are usually inherited just like other bodily characteristics. On Earth, we have gravity, so some breasts will sag if they were destined to sag. Without gravity, like on the International Space Station, breasts shouldn't sag, but that's a question best directed to a woman astronaut. However, becoming slimmer is a good idea.