<human>: Hey there, so to give a backstory. I've been with my boyfriend since Freshman year of college, it was my first relationship but not his. He's my best friend, rock, etc. We've lived together most of this past year (though I've been sleeping in his bed regularly for the past three) and are about to start our post-college life together once we find jobs.

Anyway, we absolutely love each other, talk about how its "forever" and are constantly supporting each other. He's also a pretty traditional "country"-type, so I think he would want to eventually, but I just cannot approach the topic of 'marriage' because I'm worried about his reaction. 

I guess its mostly because of how he has reacted to similar things in the past. I joke about stupid kid names and he says I'm being weird. I ask him about us in five years and he dodges the question or gives a vague answer. I just don't know how to approach the topic when ideally, I'd like to be engaged, I don't know, within 2 years from now? 

So if anyone married or engaged could help out, I'd really just like to get some advice on maybe beginning this conversation, or when you knew it was the right time to start it?

Give me a shortened version of the text
<bot>: Been with my boyfriend for four years, worried about his reaction to the "m-word", when do I start that conversation?