My f18 boyfriend m19 is being weird.. or am I the weird one?

So I ‘F18’and my boyfriend ‘M19’ have been dating for over a year now and I would say we’re fairly happy. But, my boyfriend seems to keep testing weird boundaries with me. He would watch porn and thirst traps after I told him i was uncomfortable about it but eventually he did stop. A couple weeks ago he went on a trip to the beach with his taken guy friend and they met a girl who according to the guy friend my boyfriend said she had been eying him and he refused to tell her he had a gf even after his guy friend suggested he should multiple times. He also invited her to dinner and debated not telling me. Not crossing into infidelity territory but still weird. Most recently, he went on a trip with his family and got really drunk. Whatever, I don’t mind that kind of thing. But he woke up the next morning and was already acting weird telling me how much he missed me and I was like saying it back and talking about my day. He then goes on to talk about his night, saying him and his cousin fell asleep on the couch together. Again whatever. But then he keeps going after I’ve clearly lost interest in what he’s talking about to say that she kept falling off of the couch and he was picking her up and holding her next to him and spooning her. Keep in mind this cousin he only sees maybe once a year if not less. I don’t know this rubbed me the wrong way, I don’t want to be a crazy girlfriend so I’m not going to say anything. But I definitely don’t have that kind of relationship with my cousins let alone any family members. This is not an accusation of any kind, but I’m just confused why he felt the need to keep going on about it and maybe it makes me uncomfortable because I just don’t know his family dynamic.

Should I take note of this or am I being crazy

TL;DR! – My boyfriend has been testing my boundaries with girls and porn and has now spooned his cousin while drunk. Should I take note or let it go?