need friend advice asap please dont be rude just need some simple advice?

okay im gonna give you some history first so you dont get confused and you can fully understand my situation. i have been best friends with my best friend for a little over 4 years. we've had our share of problems but no matter what we have always been there for eachother in the end. about a year ago a friend of hers from school started coming around a lot. Let me tell you their names so you dont get confused Amy is my best friend and Jenny is her friend. Anyways me and jenny started becoming very close we were always on the phone always hanging out any chance we got. amy started realizing the friendship i was building with her and started to not speak to amy anymore. she eventually ended the friendship with her for idk what reason she never has given me a straight answer why she started not to like her. so as her friendship ended with jenny, ours got stronger. at first amy was okay with the fact that i was friends with jenny. but then one day she gave me an ultimatum she made me choose either her or jenny. i chose amy. BUT i continued to be friends with jenny behind amy's back. they were like my two best friends. i really never got a long with someone so quick and well the way i did with jenny. at one point amy found out that i had a friendship with jenny. she ended our friendship immediately, we did not speak for about a couple of months. during those couple of months me and jenny continued to get closer and closer. at one point amy came back in the picture claiming that she had missed me and stuff. but she said that the only way she will be friends with me again would be if i stopped being friend with jenny. i agreed i stopped being friends jenny about a couple of weeks later. now lets forward to today. mine and amys friendship hasnt been great for the past few months. she is constantly always with one girl and when me and her had became friends again she said that she will never call me or text me that i needed to always text her first or call her. we hardly talk through out the day unless if i text or call her first. now my question and the part that i need advice is that recently i started to miss jenny a great deal i miss that friendship that i had with her...now is it really worth risking my friendship with my best friend for a person that ive known for about 2 years and never did anything but be there for me? please dont be rude i just need some advicei told amy yesterday about the situation and she did not take it well. she ended our friendship just the way i had said. she made me choose and i told her that i wasnt making the decision that based on her actions she was making the decisions for both of us. its like i do care about amy, but i cannot let anyone dictate my life if anyone is going to control it other than myself it will be my parents.

...... think rationally and decide.