Best Friend or Boyfriend

I have been in a relationship with my boyfriend for 6 months (long distance of 1 hour). We recently have been fighting non stop over little things. As well as him bringing up past fights that we have already gotten over. He has also been distant. Im not sure what to do. On the other hand I dont know if I am catching feelings for my ex guy best friend or if I just miss the friendship. We recently started talking again.