Hello DogLover79 and

Wow, that's a fast timeline... and, a very familiar one to members here. It's not uncommon for the pwBPD (persons with BPD) in our lives to make big decisions much more quickly than we would, and sometimes to change their minds rapidly and surprisingly. My husband's kids' mom was engaged to my husband's best friend about 3-4 months after divorcing my husband, and married 3 months after that. These choices often don't make sense to us.
Often, when describing BPD breakups to others, people don't always understand fully what we went through -- the blame, rage, anger, threats, and distortions are not "typical" breakup features.
Have you been able to talk to anyone (friends, family, coworkers) about what happened? How did they respond?