What is it supposed to feel like when you want to get married? (30M and 28F)

What did you feel when you figured out you were ready to get married? I (30M) have been with my girlfriend (28F) for a little over a year now and she is wanting to take the next step into getting engaged and married. The issue I’m having is I’m not sure if I want to go into that next step with her. She’s amazing and loving most times but all those stereotypical feelings people describe I don’t seem to have. I don’t miss being around each other when we’re apart and often find my energy refilled by our time apart. I don’t have warm, fuzzy feelings thinking about the future and everything that marriage brings with it. I don’t know if it’s too early in the relationship or not to consider this but I want to be respectful of her time and her feelings. I’m also 30 and feeling like I should have this figured out by now. How should it feel when you know it’s time for that next step?

TL;DR My (30M) girlfriend (28F) is ready to get married and I’m not sure if I feel the same way. How are you supposed to feel?