<human>: Provide a brief overview of the text.

For the last month I have been living with my good friend Ted [20M] and his friend/my acquaintance Kyle [21M]. Although we all get along very well, Kyle and I are both closer to Ted than each other; Kyle and I met a couple times last year, before we became roommates, but still haven't spent much time together. 

Earlier this week around midnight, having not seen Kyle all day, I made a joking reference to Ted that Kyle was staying out late for a weeknight. Ted responded not by going along with the joke but by telling me Kyle "won't be back for awhile, but will probably be able to finish the semester." He didn't want to give me any more personal information than that, but assured me Kyle "is ok and will be ok." Two days later(yesterday), I came home in the afternoon to see Kyle lying in bed. During the day has passed, Kyle has made references to being "in a hospital" where "they check on you every 15 minutes."

This is all the information I know. If Kyle thinks Ted told me more about what happened, it probably comes off as weird or cold that I don't know how to respond when he makes references to the hospital (other than saying "it's good you're back.") I want Kyle to know I'm supportive of him and glad he's well enough to be back, or at the very least demonstrate I'm not judging him for any of it. Kyle is a great guy and I don't want him to think I believe in the stigma that still exists around mental health. However, I don't want to come off like I'm prying into his personal life, nor do I want to bring up painful memories of whatever happened. The latter has been particularly difficult because I don't even know what happened, so I'm just trying to stay far away from any references to death, mental and physical health, sexual assault, etc. (Even though I'm not the type to make edgy jokes about those topics anyway, I'm trying to stay away from saying things like "I feel like death" or discussing political/news topics about those issues.)
<bot>: is it appropriate to say something supportive to my roommate of 1 month/acquaintance of 1 year about his recent stay in a hospital, or should I just act like it never happened?