i'm sure you feel like shit. that is a hard pill to swallow. my condolences.
regardless of what breed of bulldog you own, doing the right thing usually means doing the most difficult thing.
i would contact a local rescue that may help with finding a foster home. it would help if you are willing to cover the cost of food and other things while the dog is in their care. it may also help if you visit for walks and exercise to help carry the load.
this will give you time to find a proper home for the animal.
~ jo and Gotti Boi (aka Thunder Thighs, aka Jughead, aka The Doo Doo Monster, aka Sexual Chocolate, aka Mister Smiley, aka Sofa King)