If you are still wanting to be with your ex and think about him all the time and talk with him and a currently with someone, you need to really decide what you want.. Otherwise somebody is going to get hurt.. Your bf is with you and im guessing wants to be with you since you have been together so long, but I dont think he would be very happy knowing you would rather be with your ex.. Your waisting both of your guys's time being in a relationship that ur not full heartedly in..
Im not trying to be harsh about it or be mean, I just dont want someone thinking that there partner loves them and wants to be with them when it isnt true..