If you only have one lovebird, the egg is infertile. Mine will lay a couple at a time. Her water consumption goes up tremendously when she's laying, so keep her dish full. Her volume of poop will increase when she's laying too. She needs lots of fresh water.
She'll lay eggs regularly for you, just throw them away but watch out for your fingers. I keep a small birdhouse in my lovebirds cage, it gives her a place to go when she's stooping. I empty it out when I clean her cage. She likes filling it up with paper or pieces of bamboo skewers I buy her at the grocery store. She spends hours shredding them and tucking them into her tail to fly back to her cage.
I also make sure she has a source of calcium so her eggs are strong and she doesn't become egg bound.
fltsfshr