Excellent points. The dynamics of love has fascinated people and psychologists for decades, and even the neurochemicals that are produced are intriguing. But calling love an interaction of brain chemicals doesn’t quite describe how it can warm your heart and captivate your soul.
I think we sometimes perceive love feelings as uncontrollable, but it seems that we do exert some control by decisions we make in being open to it, or distraction and avoidance to shut it down. Sort of a love regulation decision. From my point of view, infatuation is most intense at the beginning but fades rather quickly, and either interest fades, or attachment and commitment begins to take hold. Attachment is an important component of love, and it seems to me that while we may have little control over infatuation, we do have more control over attachment. At first, it's a mutual attraction, but through consent, it can evolve into love over time.
Through personal reading about emotions, I found that emotions always follow thoughts. In other words, you can't have an emotion without having it preceded by thoughts. Therefore, it stands to reason that if you can change the way you think about someone, then you can change the emotions you feel for them. For instance, if you begin to feel they are just using you, then you begin to feel different towards them. However, I think that often this can change the intensity of the emotion rather than eliminating it.
Many seem to think that the feelings of love are involuntary and uncontrollable, and it may indeed feel that way. But it is well known that emotions can be regulated by generating new emotions. For instance if you are in love with someone, and they cheat on you, then that love can change to very negative feelings by cognitive reappraisal or reinterpreting. Focusing on the positives of a person increases the emotion, and focusing on the negatives decreases it.
In the long term, I think any relationship can get stale if new activities and experiences aren't brought into the relationship, such as just having fun together doing something new or exciting (Perhaps a different colored wig

).
So over time, if one begins to feel bored or unfulfilled, then the thoughts begin to subtract from the emotion. However, if they focus on the wonderful qualities of the relationship, then those thoughts increase the emotion.
So there's my nickel. I suppose putting them together makes ten cents, or ten sense, or tense scents

.