... for your own emotions. This is a subtle form of selfishness and a classic example of the poor maintenance of personal boundaries. Take responsibility for your own emotions and expect your partner to be responsible for theirs. 

It's when you get angry when your partner talks, calls, texts, hangs out with another person. This often leads to you hack into your partner’s email account, look through their text messages or even follow them around town, thinking of this as a display of affection.

It transmits a message of a lack of trust in the other person and it’s demeaning. 

Never use gifts or fancy things to replace dealing with the underlying emotional issues. Not only does it brush the real problem under the rug, but it sets an unhealthy precedent within the relationship.

This is when you and your partner continue to blame each other for past mistakes made in the relationship instead of solving the current problem.

Deal with issues individually unless they are legitimately connected.