What should i do?

So my baby is 4 months and latches on only at night and in the wee mornings like 5am . During broad daylight she only takes the milk from a bottle (doesn't matter if it is pumped out breastmilk or formula) . Hence the night feeds and 5am feeds are my precious moments with her as she latches and i get to look at her for a long time and bond with her. BUT i know she is not full from just having my breastmilk as i am not producing enough. Should i just give her formula at night and at 5am just to ensure that she is well fed or stick to my precious moments with her?