Whyyy do girls use multiple "Y's" in texts?

Before you jump to conclusions, I'm not talking about a teenage girl. I'm 21, she's a year older. she doesn't act immature or anything, but sometmes I'll get an 'okayyy' or 'reallyyyy'

to be honest, It kinda turns me off.. I just want her to talk normally! haha
Whyyy do girls use multiple "Y's" in texts?
Post Opinion