Should we break up? :( 10 points! help please :((?

k so my girlfriend and i.. .well we've been talking for 4 months, and like we really really liked eachother but with our certain situations we didnt get to date, and well we finally decided "eff" it and just went for it, because we care so much for eachother :( like i love this girl, and she loves me and its crazy and we both know it! agh but anyways shes recently gotten ALOT of workload on her, she workds 40 hours a week and basically has NO days off... she workds long shifts too.. which makes it sooo hard.. this just started happening this week, and its been hard cuz i never get to talk to her czu shes so tired.. and i let her sleep cuz i dont want her to be losing sleep cuz of me.. and she jus texted me asking if i still should date her right now? like shes asking if i want a break until she figures everything out... and its bothering me.. :( i texted her saying only if she WANTED to be with me, then id be iwth her and id make it work... but if shes half hearted about us then i dont wanna date... and she just texted back "baby no i love you with everything inside me" (this was the reply to my text " are you half hearted bout us?") she jus sent another text saying "every last exhausted piece of me, im really sorry (my name)" like wth should i do?? :(( i love her.. like reading those texts just made me feel so exhausted and my heart physically hurt.. couple days ago she told me her ex from high school (whome was one of the two guys shes had with, and was basically inlove with and thought shed marry) send her a messege saying he missed her n was upset they lost touch yada yada yada... should i be worried? and what should i reply to those two texts? :(