Do you think he’s acting weird about my age? Why???

So I am 18, a freshman in college and started hooking up with this dude in my hall he’s a senior and 22. Whenever we hangout he sometimes makes joking comments such as “you can’t drink that’s illegal” even tho he knows I do and has offered me a beer once. He also keeps asking if I’m 18 and I keep telling him yes Bc I’m 18 and a half now. It just seems annoying because I like hooking up with him but he seems so focused on the fact that I’m younger than him but it doesn’t even make sense because I am consenting to hangout with him and every time he brings it up, it just kills the vibe and it lowkey feels like he’s belittling me or something but he’s always the one inviting me over and wanting to get sexual. I had told him I was a virgin because he asked to have sex and I said no because I know morally that it’s right to wait for the right person and he’s just a hookup to me. He told me that he respects my decision and then like two times after that he asked for sex again and it’s just so conflicting because I finally feel physically ready to have it, but want it to be with the right person but I’m also horny but I use logic and decided not to. Plus I thought about it and even if I did want to lose it to him, he treats me like I am just this little kid sometimes. It makes no sense like how can you say those stupid things and then expect me to want to have sex with you, ya know? The last time we hung out I wasn’t even in the mood for sex, I just wanted to chill and watch a movie and it was nice, for some reason i was burning up like really warm and he noticed and we did some making out and he got a little aggressive like choking and slapping which I don’t mind I think it’s kinda kinky, but he was on top of me and wanted a blowjob but I just didn’t want to (Bc he’s also uncircumcised and I’ve never did it w an uncircumcised dude) and then he was practically begging for sex, not in an aggressive way tho like he was just teasing and then he pulled out a condom as a joke and started to open it and I was freaking out inside and hit it aside. We get along fine, like he fingers me and goes down on me good, but the last time he said he would go down on me if I go down on him so I think he has sexual frustration. I’m probably gonna end things w him soon as he’ll be graduating in the spring and I won’t be on campus in the spring. I know this guy is weird. But can someone make it make sense?🤣 like why is he so caught up on my age when he has tried hooking up with other 18 year old girls too? Like he asked my friend (which I’m assuming he doesn’t know I know) for sex but she’s waiting for marriage, and he has me who’s waiting for the right person🤣 so he’s probably just sexually frustrated but I don’t get why he keeps trying to get w 18 year olds if he clearly has an issue with it. Right???