some kind of jealousy

I'm terrified that while we are listening to music,a song that is reminding her of him,her great love,will start.And she will drift off in thoughts about him ,about the past.I don't want that.But I guess it's unavoidable.She ,thinking about him or about anything else.It's kind of strange and selfish to want to control someone's mind and thoughts like that.But me,feeling this way,is also unavoidable.