Does falling in love or forming a relationship, require a handbook?

I am questioning myself on this topic because out of conversations and discussions with friends, some of them provide details pointers on love and relationship, some just provide more confusing examples of the do's and don'ts. Really, is relationship that complicated, or we, who are in the relationship, tends to complicate things? 

I am just curious because sometimes for me the examples are a bit absurd and do we have to do that. Take for example, pet names, or just calling someone abang or sayang, or baby, if we don't call that name in text or face to face, it will cause the partner or the counterpart to sulks. If we don't allow him / her to hold our hands when we are walking together, it’s a sign that we don't love them, if we don't say I love you every time ending a conversation or starting one, it means that we don't love them. Is everything, every thought, every movement, every text must indicate, signals or means something?. People say that I am not in a relationship so I will not understand all of this. But I do understand one thing, relationships means trust and respect, if we trust our partner and respect them and even their time, I guess it will work in any relationship. There is no such thing as smooth sailing, problems, issues and conflicts will occur, just take a step back before we blow everything out of proportion. "Every good conversations starts with a good listening".I will call a person sayang, or baby or anything, when I am sure that, that person is the one.

But if anyone is writing the 'Love Handbook' please make it easy to understand, hehehehe, maybe called it "Handbook of Love for Dummies".