Itc refund on export of service wo igst

Hello,

We have some amount in our credit ledger due to some ITC input we took for FY 17-18.

We don't wish to take a refund of it, as the process seems complicated,and the refund amount is really low.

Can we just leave it as is? Will it expire?

Eventually, we will have to fill these in GSTR-2, is that it?

Thank you.