can someone help me

so my boyfriend and i have been dating for over a year. i’m about to be 17, he’s 18.

Flash back to around July of 2018, he started getting more upset and mad about little things, and making me feel bad and sad because i would make him so upset about just these small little things.

Now fast forward to right now, present day. As an example He just recently randomly asked me “so you’re having a sleepover with your friend next weekend and you didn’t tell me???” it caught me off guard.. it made me feel as if i did something wrong.

idk what’s wrong with me, can someone help? am i too sensitive?