am i just a hookup to him? did he lose interest?

backstory: i met this guy two months ago on dating app. since then, we’ve been seeing one another weekly. in the beginning, things were perfect. he facetimed me multiple times daily just because he missed me, or constantly texted me sweet, cliché things that reminded him of me. he’d talk hypothetically about all the places we could go on a date to and things we could do.

as time went on, he started communicating less, and now whenever we see each other, it’s just to have sex at his place at night, watch a movie, cuddle, etc. and then he drives me home. a lot of our conversations also get easily sexual (courtesy of him), and sometimes i get the feeling that sex is his only motive.

on the other hand, there’s so many small things that make me wonder if he wants something serious. whenever i returned a missed facetime call hours later, he picked up no matter where or who he was with, then proceeded to introduce me — his mom, close friends, co-workers, etc. when he showed me to his mom, he’d even asked her “beautiful, right?” in reference to my appearance. he’d even picked up my facetime and showed me around his friend’s engagement party.
or he always took videos of me whenever we’re just doing domestic things (like him teaching me his video games) then sent it personally to his friends. or when he called me, it was often to simply ask about my day or how classes were while he was out running errands, playing video games, at the gym, etc.

i guess another important factor to note is that i’m 18, in uni, while he’s 25, with a full-time job. i’ve never done anything with a guy before him, never dated, never had sex, etc. while he’s pretty experienced. part of me feels taken advantage of when the only time we see each other is to have sex, but another feels like he really does care, when he takes time out of his day to talk to me.

an additional concern: now it’s been almost a week since i’ve last seen him, but he has yet to text nor call me. the last time we saw one another, things left off on a sour note. we didn’t get in an argument or anything, but the tension was a little rough since we had a little “unprotected sex scare” and nerves were running high. the most we’ve gone without talking before is two days, so i’m getting a little concerned. opinions please?