Is it wrong to play with children ages 11-14 if you are 18?

hello my name is luther I am trying to fiqure out if what I am doing is wrong I dont think its wrong but one person in particular does.. or at least thinks I have to be doing something bad. I remember very vividly not being accepted by older brothers and likewise being told grown people are talking are you're too young and now that I am a young adult my heart is telling me to be that older teen that I so desperately wanted when I was little. and on top of that I find when I am around kids tell me things they don't tell their brothers or even close friends definitely not parents. If I can help them I do If I cant at the moment i tell them how to get help or educate myself and then go back and help them. Is this wrong should I just hang around the people in my age bracket???