My boyfriend has a spotify playlist dedicated to his ex... weird?

ThatWeirdOne
It has been concerning me. My boyfriend and I have been together for a year and a few months but we have been friends for about 4-5 years. He and I use each other's phones all the time and I saw that he has a spotify playlist for his ex and he regularly updates it. It concerns me because the songs he adds to the playlist are always about how he misses her or songs about romance between them. The most recent one was Moonlight by Hobo Johnson. He and I live in different towns and everytime he goes back home, he messages her. I understand that a healthy relationship will always stay a healthy relationship with good memories. So people you care about you'd want to stay in contact with them. But this has been irritating and confusing me and honestly it hurts my heart a lot. The songs he adds to it that remind him or her... you'd think he was single waiting for her. I love him so much. But I would like to avoid any heartbreak before it's too late. Our relationship is open communication but I'm not sure how to go about approaching this situation or what to say honestly. But I want to understand and not just jump to conclusions and leave him because he might be in love with someone else. Any suggestions or opinions are welcomed. I would like to know other perspectives to this.
My boyfriend has a spotify playlist dedicated to his ex... weird?
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