I'm suspecting my gf is thinking about breaking up with me?

i felt like that for a while and then she send me this really nice text yesterday but now i feel like that again because i haven't talked to her today. why do i feel like that? i've usually been really intuitive about things like that. i think she found another girl. should i start mentally preparing myself for her breaking up with me because i really think she will she's been flaky lately.