<human>: So,  I'm a 21y/o female dating a 23 y/o male. We dated for a year an 9 months,  took a 2 month break due to emotional issues, were in an "open relationship"  (we agreed that we could see other people, but we never did) for 5 months after the break, and we have been back together for two months. During our 2 month break he dated another girl for about a week. This girl was staying with him at his apartment due to family issues and they hit it off. They dated for approximately a week before she broke it off. A month later she moved back in with the guy she dated before him. 

In the past two months my boyfriend and I have talked about her a few times. The most recent conversation is the killer. Even though they only dated for a week, and she has been gone for 7 months, he still has feelings for her. I figured, no big deal, cut her out of your life until you get over her and move on. Apparently this is not an option. They continue to talk on a daily basis.  He told me that if he had to choose between talking to his friends or being with me,  that I can start packing now. I don't understand why he won't quit talking to her. At least until he gets over her. I don't want to lose him.  And every time I bring it up we end up fighting. I don't know how to get him to see my point of view, and quit talking to her. I need some good advice, asap. 

Note: If your only advice is to leave him, please don't waste your time.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: My boyfriend won't quit talking to his ex that he still has feelings for.  How do I get him to stop, without leaving him?