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

I (23F) have been hooking up with my friend's roommate (30M) for about a month and a half. When it first started happening, we talked and both decided we don't want a relationship. But it seems to me, lately, that things are not as casual as just hooking up. For example, he wants me to stay the night after and sometimes ill sleep over and we won't even have sex (which kind of frustrates me since my sex drive is super high lately). We aren't really affectionate when other people are around, mostly because a whole bunch of us hang out together and neither of us need anyone nosing into our business, which is totally fine with me. But inevitably, other guys will talk to me and pay attention to me, because they think I'm single. Often, the guy I'm hooking up with will mention me talking to some other guy...sometimes he'll say something a few times about it. 
   
 Also, he's told me how much he likes me (in fact, he says he likes me too much and needs to be careful) but he thinks we wouldn't work as a relationship...he's also said he thinks I'm too good for him. I've talked to a few of my guy friends about this, and they've all said the same thing: that he wants more but doesn't know how to approach it. 
So, a few questions. Is he jealous of the other guys I talk to? Is he sending me mixed signals or am I just reading too much into things?
Thanks in advance! Also, x-post to r/sex
<bot>: my hookup buddy is giving me mixed signals (kinda jealous, wants me to stay over all the time), but insists he doesn't want a relationship.