Influencing and/or expecting change is often a difficult thing to navigate, but if you think about it....most people become parents, and attempting to guide the change that comes with growth becomes something most will have experience with at some point because of that. Not that parenthood is the only place this dynamic presents itself, I'm just pointing out that it's one of the common circumstances of it in life that will bring those who avoid it to this experience - we all find our way to it. If you care for somebody, it's absolutely valid to to approach them on this basis. Sometimes you should try because you care about yourself. Just do it with consideration and patience. Be careful reacting quickly to their own reaction, especially if it's negative. Give things some thought. Reflect and let it breathe. I'm 31 years old. I've been in a relationship for about 7 years now - married for 3 of those years. Sometimes we do make changes, sometimes we learn how to be content without it. Things can be more complicated than they seem, but love is eternal. Just be sure not to grind yourself against it when the better action is not to have it.
"4 Love is patient, love is kind. It does not envy, it does not boast, it is not proud. 5 It does not dishonor others, it is not self-seeking, it is not easily angered, it keeps no record of wrongs. 6 Love does not delight in evil but rejoices with the truth. 7 It always protects, always trusts, always hopes, always perseveres." - 1 Corinthians 13:4-7