@Buttercupbendy id u love her let her know. Even if u cant understand sometimes, reassure her that you care and are trying. Make sure to be as honest with her as ppssible without being rude. I know sometimes im too honest and it can come off as rude or blunt. Ask her how she is often, show interest in her interests. Try new things if shes interested in things u are unfamiliar with. If she says shes fine, check contect clues, vocal tune and body posture. Girls are usually subtle and think u know what they are feeling and why. Stay patient, let her know your only human and keep in mind that she. is too. Humans have flaws, bad days, and sometimes just need time to process stuff. Respect that if she needs a moment to think. Random acts of kindness are abig plus for most girls.
Without knowing more about the girl, situation and relationship, this is about all the advice i know to give for now