it was too much

so i had this kid, he was eighteen and his dad died young so he looked up to me a lot. we started hanging out more after that because i could see the weight on him from it all. one day hes talking about how hard everything is and starts crying and i put my arm around him trying to comfort but then i dont know what happened, it just got weird. he was so vulnerable and i kinda felt like a safe space for him or something. before i knew it we were getting close and stuff and it escalated really fast, like suddenly things were more than they should have been. now im in my 50s and this kid is twenty one but its still gnawing at me. i feel so bad, like i took advantage of his pain or something. hes an adult now and says everything was okay back then but it just feels wrong to me. cant help thinking maybe if i had put more space between us he wouldnt have felt the need to look for comfort elsewhere. i should have been a better person that day.