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We often connect past relationships to the music of that era. If you're married now, it's probably wise not to listen to that music any more. Then you probably won't relive those memories and be drawn away from your spouse.
What does "in love" mean? The word love means many things to many people. Feeling "in love" means exactly that - a feeling. Feeling "in love" doesn't necessarily mean you should marry that person.
Many Christians pride themselves in holding back their anger; but internalizing anger is very unhealthy. The Biblical challenge is that when we experience anger, we are to process it in a positive way.