Real Life Problems

Hello, recently one of my friends has confessed to me. I'm not particularly good at receiving confessions so I asked for time. I don't know how to respond to him, I'm not sure if I like him or not. I can see myself in a relationship with them but at the same time I don't know and I'm not sure if I'm ready for a relationship, can anyone give me advice? Maybe mangago isn't the best choice to go to for advice but I really need help.

so i have this memory when i was 6...one of my cousins went with me to the toilet and showed me his pp. i don't remember much else about it. all i know is that i want to get rid of it because i can vividly imagine it and he was only three years older than me so its like seeing someone underage when i remember it.
i don't think it should be worrying, right? it can't really mean anything since he was only 9. maybe i remembered it in the wrong context? would this count as traumatic? should i tell someone about this?
another memory i have is someone i know taking me to his room saying i could play on his games console but he just hugged and groped me instead. should i tell someone about these? is this bad?
i'm scared these might have traumatised me since sometimes i feel like i'm not clean when i shower. i also have a lot of sexual urges. i also have some nightmares too that are related to pedophilia, cousins and incest. should i tell someone? please help me what do i do?