Should I ask my girlfriend about her past?

[COMEDIAN95]

I know most of my girlfriend's past but I went back to 2009/10 on her facebook timeline as part of an inside joke with her and noticed lots of crudely statuses like: the guy i lyk must h8 me. And "jst got over sum1 now I lyk sum1 else."
She was 13/14 back then and is 18 now. I'm not OVERLY stressed about this but its just because she never told me, then again I haven't told her about all my crushes.
So, should I just leave it? Given how long ago it was and how young she was, should i just accept the names of these don't matter because they are long lost petty crushes?
Can I just repeat... she was 13. She's told me about all of her boyfriends, what she did with them, even some of her crushes. I'm just looking for reassurance that she probably never thought to tell me about these ones because she simply can't remember them or sees them as stupid and pointless.

[MrLoon]

Never dig the past

[Wow]

Girls past from this generation is always horrible bro

[Alan T]

What she did or didn't do before she was with you is none of your business.

[Katie]

Just leave her be it's okay it was along time ago