<human>: F 22 and M 28
We've been dating for two years, living together for 8 or 9 months. We've both changed so much over the last two years that I wonder if we really should make this forever. In the beginning I knew that I wanted to marry him, I was just taking my time to make sure I didn't rush in like so many others around me. I could picture myself married to him and it all looked great. 

Lately he asks me if I think about us getting married and I say no, because deep down all I can think about is being alone, doing what I want without having to think of anyone else, and being a strong single woman. We have great physical chemistry but it seems to me that he doesn't understand who I am anymore... and truth be told I'm not very good and understanding him. We are good friends, but there is something missing in that friendship. Will it grow over time? 

The more all of my other friends/peers get married the less I want to. I judge them all, I feel like they are all lying to themselves that they want to or that they are so happy in their own little world that they can't seem to see the reality of what is going on around them. It just makes me sick, I don't want to be like that. I don't want to be like people who have to lie to themselves to keep their marriage alive. But it seems inevitable. 

I don't want to break up. But if he were to ask me to marry him, I know at first I'd be really excited and flattered, but in reality I'd have to say no. I don't want to get married. I feel like this answer could change if I'd just give myself some time, but that is not a guarantee... is it unfair to him for me to continue on in this relationship when I have such strong reservations and questions even after 2 years? 

I love him, but I don't want to be selfish. Breaking up feels selfish and staying together feels selfish. I need to talk to him, but not sure how to break the ice. Bringing up this conversation feels like walking on a glass roof.

Can you condense the text into a few key points?
<bot>: Boyfriend of two years sounds like he's getting ready to propose, I can't say yes. (Not sure what to do)