<human>: Provide a brief overview of the text.

Hello good people of r/relationships. Hope you listen to my story for a while and give me advice/s on what shoud I do. Currently in mobile so if any grammar/format is amiss, I apologize in advance.

Okay so I have been with my gf for two months. Was happy with her and having some of the best moments in my life with her. My family knows her as well as her family knows me. Pretty much were contended and happy with each other. Finally after some time I told her I have a bff, who is a girl. Why did I say that, because when I told her that she went over the line got jealous of her. Bff and I dont live close to each other however we go to the same college. Gf lives also quite some distance, about two hours. She's jealous because I always get to with my bff, then whenever she sees me texting my bff she gets mad.

I love my gf alot, I would love to make this relationship grow more into well something permanent(high hopes). But she is extremely jealous with my bff, she thinks that my bff will take her away from me and all that. But I keep trying and explaining over and over again that we would stay as Bff's . Then she makes one question, a question I never wouldve thought I would hope encounter; "You choose, ita either me or her." I was devastated with her asking that question. I kept on reassuring her still that there is nothing going on with us(bff and I).

I hope I can get some advice or what should I do to reassure her for good. 

If anything is unclear or lacking information, I would gladly add it when I get on my computer.
<bot>: Me and Gf are fighting because she is jealous of my bff. Texting/being with bff is a big no-no for her. Gf gave ultimatum.