Girl, if I could cast a spell to win the lottery I would be living a much different life. Lottery spells usually don't work anyway because almost everyone who plays feels they have the "need" to win.
Just because I can't help you win the lottery doesn't mean that I can't give you some advice on drawing money/prosperity to you and/or him.
Carry around these gemstones: pyrite, green aventurine, bloodstone, green calcite, herkimer diamond, jade, red jasper, lodestone, malachite, peridot, green quartz, tiger's eye, and turquoise.
Put two or three of the following herbs in a gold or green bag: basil, blackberry, chamomile, red clover, jasmine, sage, or vervain.
Carry a copy of the 10 of pentacles/wheels/disks/coins tarot card.
Good luck and may the prosperity Gods and Goddesses be with you and your boyfriend!