Is it reasonable to worry if your boyfriend doesn't talk about marriage?

Well it all depends on how long you have been together I would think. I was with my ex for seven years and even though I was ready to settle down, he wasn't and never mentioned the word "marriage" until I left him. I suppose some people are just not ready. Maybe you can mention it to him and see what he says?

Well, some people are afraid of commitment, some don't want to be tied up.