21st birthday for a young mom?

I'm turning 21 soon and I want to do something fun to celebrate. Here's the catch, I'm feeding so alcohol has to be kept to a symbolic minimum. I do not leave my son, ever, so whatever we do mist be both fun and kid-friendly. Also, should I tell my friends I'm turning 21? Most of them are 5-10 years older than me, I'm a little worried that they'll treat me differently if they find out how young I am. It took a lot of work to fins other moms to connect with, I don't want to ruin it. A lot of people ume that I'm "loose" when they realize that I was 19 when I had my son and are very condescending. I got married at 18, used the pill perfectly...it was just the luck of the draw, and I do consider it to be lucky. My son is an incredible kid and I love being his mom. I'm also lucky enough to get to stay home with him, thanks to my wonderful husband, and I am in school full time online. Based off of my lifestyle most people guess that I'm 22-25. Would you treat someone differently if you suddenly found out that they got pregnant in their teens?