Most Helpful Guy
I think they just saying you compliments, don't think about them as lyers. Just know that they say it in a good way.
by the way I guess you look old, but don't bitch about that.
Most Helpful Girl
When waiters/barmen say stuff like, "Oh, I thought you were in your teens!" upon seeing my driver's license, and grocery clerks ask me how my first day of school was, and family friends assume that I'm dating my 15-year-old brother upon meeting us for the first time... I figure it's because I look young.
If people are telling you that you look young without you asking for their opinion or mistaking you for a younger person, you probably look young.