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

My boyfriend (23) and I (19) have been together for almost a year and a half. We have a great relationship, however he found an apartment with a friend of a friend along with her other friend. Both are pretty females around his age who are in the same field of work as him.

I trust him but these are two random girls whom I've never met and probably won't want me around. He said that "he's mature enough for this living situation" insinuating that I am not acting mature. Whenever I've brought up the idea of us moving in together he brushes it off and says something like when the time comes we'll talk about it. There's the small age gap but that has never been a problem. He just graduated school with a good job. I've been told by most if not all people I've met that I'm extremely mature for my age. I'm in an accelerated college which I am paying for myself, and have always been independent financially.

He'll probably be making significantly more than me once I go back to school but is this a reason to not move in together? Am I being immature about this? I can't be the only girl who would be uncomfortable with his choice of living situation.
<bot>: boyfriend of 1 1/2 years moving in with 2 attractive females I've never met. I feel uncomfortable, worried, but most of all jealous and hurt he doesn't seem to have an interest in moving in with me.