gang is 18 and 23 an acceptable age gap
im 18 btw not a groomer
"acceptable" is a different thing from "comfortable"
if for example the 23 year old is working full time and the 18 year old is starting college, it might feel like you are in different phases in life and eventually lead to emotional distance just because of how differently you are spending your time and where you want to go. be aware of your directions in life