<human>: Condense the text into a few key points

To be clear, he didn't propose. He just told me, very honestly, that he's been thinking about it and his intention is to propose as soon as he feels that he can offer the sort of financial stability a marriage requires. 

We're both in college, about to graduate in May. We've only been dating for a year and a half, but have lived together the entire time (roommates first, then started dating while living together). Our relationship hasn't been perfect, but we've only had one major crisis and it was caused by my inability to deal with my own anxiety issues, not our relationship itself. We love living together because we both work multiple jobs on top of full course loads, so we don't have a lot of free time to see each other outside of breakfast and dinner together each day (and, of course, actual dates whenever we have the time/money). He thinks that these are all signs that we're compatible long term, and I'm tempted to agree. The rational part of me, however, is telling me I'm to young to be considering it and I'm weird for not freaking out.

My biggest concern, other than being too young, is that I'm his first serious girlfriend--not the only girl he's ever dated, just the only one that's lasted more than a few weeks. He's fairly introverted and very much a homebody, which accounts for the lack of many serious relationships, but I'm a little worried that he's just comfortable now and will eventually think that he missed out on other dating opportunities. He swears this is not something I should be concerned about though. Reddit, what do you think?
<bot>: Boyfriend of 18 months didn't propose, but clearly stated his intentions. I'm worried because I'm not scared, but think I should be because we're so young.