Existential crisis.. am I a monster?

content warning: talks of explicit acts and fear of cheating or attraction to another person I had a dream yesterday about breaking up with my boyfriend and now I had a dream I cheated on him. They scared me but I've realized that they don't really mean anything. I only am freaking out again because while I was self pleasuring earlier, I was thinking of my partner and watching him until I had an intrusive thought someone I just saw in a tik tok and that got me there. im so scared because I didn't mean to let my mind slip and I really feel like I need to talk to my partner about this because i feel so guilty and I know something like this would hurt me if the situation was flipped so I don't know what to do. why did I like the thought so much to that point??? how do I convince myself I don't need to tell my partner even though the guilt is setting in and it feels so wrong? I feel ashamed and unfaithful and terrible I hate that this happened how I do know what to do what if it wasn't an intrusive thought and I enjoyed it even though I tried to change my thoughts?

Is it normal to be flattered when the opposite gender gives you attention and to like to feel pretty? I have a loving boyfriend and I would never cheat on him. I feel like I emotionally cheated because I was dancing at a wedding reception and was enjoying that this MUCH older, popular, “attractive” guy was noticing me. I tried to move my butt or dance “better” when he was looking?? My boyfriend was not at this reception and I was drinking. When the older guy left, I was sad because I wasn’t going to get the attention that I was getting. But we didn’t have a conversation other than him saying a few words to me. I did not say anything back to him. But I did enjoy his attention because I felt pretty. I never ever wanted to cheat on my boyfriend. I just wanted to look good. I don’t know why. This sounds awful. This incident was almost two years ago and I still feel horrible about it. My dad has told me this is human nature and I’m just overthinking it. I’ve already told my boyfriend and he was hurt but he said it would be like him wanting to look good on the beach in front of people.

+18 TRIGGER WARNING I’ve been rethinking things from the past and one of those things was a conversation I had with someone on the chatting app yik yak about six months ago. On there, I joined the smut community and started posting stuff on there (story excerpts, writing questions, etc.) and someone dmed me about one of my posts. They asked if we could role-play a situation about a husband and wife. It got pretty graphic, too. We moved off the app and started texting but my anxiety got the better of me and I looked up their number and found their social media. It confirmed the school that they told me they went to, their major, work experience, and even their name. According to their social media, they’re 23 (22 during the time of our conversation) and I’m pretty sure it’s the same guy. Still, I DONT KNOW for certain and I’m scared that I was interacting with someone underaged the entire time. I’ve been going back through screenshots to try to decipher what I can find but it still hangs over my head. (Edit: I did ask for their age when we were texting and I remember that they told me they were 22. But I can’t find any of those texts and I’m scared that my mind is just filling in the blanks. I have had their number blocked and deleted from my phone since March of this year.)