So my FP is my best friend. We have an amazing an healthy relationship where we both communicate our thought and try to adapt to each other’s issues. He is the best FP I could have and he makes me very happy. 
However I know I tend to split w people. Not in a hate way, I don’t hate, but I just lose interest or get annoyed by them for some times. I do not want that with him because he is so amazing and he does not deserve that and would be truly hurt if that happens. I don’t see it coming but we never know... what can I do? Is it possible to not split with your FP?