my [M19] girlfriend [F18] wants to go back to the talking stage

So, my girlfriend and me are together for like 1 1/2 months now. today she told me that she feels like it’s too serious and that she doesn’t want to be in such a committed relationship so quick. Now i’m just wondering if this is „normal“, because i’ve got a feeling that she’s doing this, to make the breakup with me easier.