Did I make the right desision?

My "Best Friend" has recently "Been to busy for me" and every time i ask her to hang out thats her answer. She's to busy. But she always makes time for her boyfriend.?? And she always tells me to keep him out of it when i bring up that mabey he is the reason why are friend ship is falling apart. So i messaged her to confront her about the problem i had with this. And ive kinda came to the conclusion that i want to end our friendship. I just cant stand lettin someone walk all over me and making me feel so small. Am I making the right choice?