How to manifest when you live with a pessimist?

I wanna manifest my dream life (winning the lottery, living abroad, being rich and in peace) but how to manifest when you live with someone so pessimist? I get that sometimes we need to be realistic and we have some obligations but Jesus Christ, it's annoying living with someone who complains and talk about negative stuffs ALL THE TIME! I even avoid talking about law of assumption and my dreams to them.

I still believe in my hopes and dreams but so tired of hearing stuffs like that and pretend to agree with them (so I won't get into a argument). What to do?