I (31F) have a coworker (53M) who started a couple months after me at my current job. He's very outgoing and nice for the most part and we've became friends but as of lately, he's started to kinda get on my nerves and I think he took notice of how I'm feeling towards him as of recent.

I don't mind talking and interacting with the coworkers I trust but sometimes, I feel he doesn't know boundaries or something. He likes motorcycles and will keep showing me motorcycle reels on his phone, even when I'm showing no interest. Initially, I did but it's got to be too much. Just the other day, he proceeds to show me a video of a young lady biting her boyfriend's toenails off and asks me "would you do this? I think you would do this". While he was joking, it pissed me off because I found it kinda weird and I don't know him well enough to be comfortable joking with him like that.

We work third shift at a very boring job and last week, I fell asleep briefly at my desk. Next thing I know, I hear my keys rattle and it's him standing next to me waking me up, then starts joking about it. Another time, he was eating some kind of pastry and puts in my face and says "want a bite?" and then pulls it back quickly.

Today, he came up to me and asked what was wrong with me and I told him I didn't want talk to about it. I've been dealing with a pet that is sick but I didn't tell him. He proceeds to say "Man, you're always going through something". He's a nice man overall but it's to a point now where I don't enjoy talking with him as much because he just doesn't know when to STOP. AITAH in this for backing off and not being as talkative with him? I want to tell him how I feel but I feel it'll rub him the wrong way, which is why I sometimes don't get too acquainted with certain male coworkers for personal reasons.