The thing is I'm actually really serious about her, I'm 23 atm and maybe in like 2 yrs after I get my own place I'd like to marry her if we get to that point...
Ah, okay.
But still not clear to me ... you say you're just dating yet you speak of a long term relationship. Just dating isn't a long term relationship.
That may be the exact problem she's having and the reason for her wanting breaks. Could be that she simply wants you to step up to the plate.
Other possibility is that this dating-relationship doesn't really feel right to her. Maybe it's too ... (take your pick: boring, constricting, not-going-anywhere)
Can also be that she doesn't want it to get serious and that whenever she feels you are, she wants a break for a bit.
So you see, many options. We don't know the answer. The only one who does, is her. So TALK to her!!! Ask her, address the issue.