Should i wait or breakup?

Im dating this girl and I really love her but like all of a sudden shes rude and mean and she says she stressed but there are things she says thats kinda hurtful to me and she can very much control those things even is shes stressed. I just want to know...

if I should wait and see if she starts to get better or breakup with her.

you shouldnt just wait, and sit there while she keeps being rude to you
you should talk to her about why shes stressed and how it makes you feel when shes rude to you
if she cant see your point of veiw, and doesnt understand or think its a big deal that you feel upset when shes rude then it might be a good idea to break it off