<human>: Title pretty much says it all, but I'll give you my reasoning so you can make sense of the situation!

We have an amazing, amazing relationship. I know you're thinking that we're possibly still in the honeymoon phase, but we *do* fight when we have to, make up when we have to, and discuss things when we need to. We live together, and have done so from about 2 months in. 

We've talked about having a future together, and both agree with what we want in terms of family life, kids and a future. Lately we've been talking about marriage, and both agree that we would like to in the future. 

I was on his phone the other day (not secretly or anything, mine was just dead) and I went onto his safari and saw he had about 3 pages of engagement rings open. We're about to go on an overseas holiday to an extremely romantic location, and last night he started talking about how by the end of the year "we're going to be married" then started laughing. 

*Then* he started laughing because his friend "would be so jealous" if we were married before him because he's been contemplating whether to propose to his girlfriend of four years and "he wanted to be the first to get married."

I don't know whether I'm overanalysing or if he's going to propose or what, but I'm freaking out. I want to marry him in the future, and I want to spend my life with him, but I don't want to be married at 19. I'm happy with the way things are going and where we're at right now.

How do I diffuse this situation?

Can you summarize the given text in a few sentences?
<bot>: Think my bf is going to propose, and while I want to marry him in the future, I don't think it's something I want right now.