Believing you can get pregnant after infertility - help

Once you’re used to BFNs every month even through fertility treatments how do you get into a mindset of a BFP being possible? Like I literally can’t even imagine being pregnant and peeing on a stick for a BFP any more.

We are doing our first FET in about 3 weeks and I want to be in a good state of mine but also realistic but everything has failed up to this point. Even though we have 9 embryos in the freezer I can’t believe our luck will change.